Problem with a hitch in loading xml-content

[alxpalm]

I am currently making a site for a client using Joomla! as a backend, and a flash frontend. I have all the information from the joomla parsed out with a xml parser, specially made for this site, wich more or less just rewrites the rss feed from joomla. The first pages are all good, no problem there, but when i get to the pages with somewhat more information, like "Clients" (Kunder in swedish, wich the site's language is in), there is a small "hitch" or "glitch" when loading the content, making the previous content to show for about half a sec before the switch is made. My guess is that it's all about the amount of data being loaded, because the time before the right content is showing varies from time to time. I have a preloader for each xml content, not a visual preloader, but a preloader none the less.

Here is the code for one of the pages that i am having a bit trouble with:

maincontent_mc._alpha = 0;
maincontent_mc.target_mc._y = 0;
resetBody();
// Roll over color for all buttons
var rollOverColor:String = "0xd56090";
// Set main body to invisible so it fades in
maincontent_mc._alpha = 0;
// Same thing with the news list
newslist_mc._alpha = 0;
// Reset main body
resetBody();
// Reset news list
resetList();
// Create XML
var kunderXML:XML = new XML();
// Ignore whitespaces, should use in almost every case
kunderXML.ignoreWhite = true;
// Load XML
kunderXML.onLoad = function(success) {
    maincontent_mc._alpha = 0;
    maincontent_mc.target_mc._y = 0;
    // Fade it in
    fadeIn(maincontent_mc,7,0);
    // Create a stylesheet for main body
    txtCSS = new TextField.StyleSheet();
    // Load our CSS file
    txtCSS.load("news.css");
    // Apply the stylesheet to the text field
    maincontent_mc.target_mc.body_txt.styleSheet = txtCSS;
    // Enable HTML for text field
    maincontent_mc.target_mc.body_txt.html = true;
    // Set the text field to auto size
    maincontent_mc.target_mc.body_txt.autoSize = "left";
    // Holder var for XML
    newsNode = kunderXML.firstChild;
    // If successfull...
    if (success) {
        // Find total # of years
        totalyears = newsNode.childNodes.length;
        // Create array to hold years
        var years:Array = new Array();
        // For every year....
        for (i=0; i<totalyears; i++) {
            // Add the year into the years array
            years.push(newsNode.childNodes[i].attributes.name);
            // Find the total # of news items for each year
            var totalnews:Number = newsNode.childNodes[i].childNodes.length;
            // Set yearitem to a XML menu
            yearitem = yearlist_mc.attachMovie("year_mc", "yearclip"+i, i);
            // Position the year menu
            yearitem._x = 40*i;
            yearitem._y = 0;
            yearitem.i = i;
            // Set the text field to equal the year name
            yearitem.name_txt.text = years[i];
            // Insert a var for total tracks in each year nav
            yearitem.mynews = totalnews;
            // When the year menu is rolled over, change color
            yearitem.onRollOver = function() {
                // Show rolled over state
                var yearColor = new Color(this);
                yearColor.setRGB(rollOverColor);
            };
            // On click a year...
            yearitem.onRelease = function() {
                // Set global far for total news items for selected year
                _global.mynews = this.mynews;
                // Clear list
                resetList();
                // For all total years...
                for (i=0; i<totalyears; i++) {
                    // Enable all yearitems for clicking
                    yearlist_mc["yearclip"+i].enabled = true;
                    // Return them all to their original color
                    var yearColor = new Color(yearlist_mc["yearclip"+i]);
                    yearColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
                }
                // List news for the selected year
                for (i=0; i<this.mynews; i++) {
                    // Var for attaching a news item clip
                    newsitem = newslist_mc.target_mc.attachMovie("newslink_mc", "trackclip"+i, i+1000);
                    // Position news list
                    newsitem._x = 0;
                    newsitem._y = 21*i;
                    // Set the text fields to the xml values for each news item
                    newsitem.date_txt.text = newsNode.childNodes[this.i].childNodes[i].childNodes[0].firstChild.nodeValue;
                    newsitem.title_txt.text = newsNode.childNodes[this.i].childNodes[i].childNodes[1].firstChild.nodeValue;
                    newsitem.main = newsNode.childNodes[this.i].childNodes[i].childNodes[2].firstChild.nodeValue;
                    // Show the rolled over state
                    newsitem.onRollOver = function() {
                        var newsColor = new Color(this);
                        newsColor.setRGB(rollOverColor);
                    };
                    // Show the original state
                    newsitem.onRollOut = newsitem.onReleaseOutside=function () {
                        var newsColor = new Color(this);
                        newsColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
                    };
                    // Click a news item
                    newsitem.onRelease = function() {
                        // Reset main body
                        resetBody();
                        // Set title field
                        maincontent_mc.target_mc.title_txt.text = this.title_txt.text;
                        // Set date field
                        maincontent_mc.target_mc.date_txt.text = this.date_txt.text;
                        // Set the body field
                        maincontent_mc.target_mc.body_txt.htmlText = this.main;
                        // Redefine scrolling info
                        maincontent_mc.scrollList();
                        // Enable all news items for clicking
                        for (i=0; i<_global.mynews; i++) {
                            newslist_mc.target_mc["trackclip"+i].enabled = true;
                            // And return them to their normal color
                            var newsColor = new Color(newslist_mc.target_mc["trackclip"+i]);
                            newsColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
                        }
                        // Set the selected news item to new color
                        var newsColor = new Color(this);
                        newsColor.setRGB(rollOverColor);
                        // Disable current news item for clicking
                        this.enabled = false;

                    };
                }
                // Set the selected year item to new color
                var newsColor = new Color(this);
                newsColor.setRGB(rollOverColor);
                // Disable selected year item for clicking
                this.enabled = false;
                // Update news list for scrolling
                newslist_mc.scrollList();
            };
            // Show the original state
            yearitem.onRollOut = yearitem.onReleaseOutside=function () {
                var yearColor = new Color(this);
                yearColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
            };
        }
        // Everything from this point forward initialized latest news info to display (not relying on user input)
        // Initially set var for total news items for latest year
        _global.mynews = newsNode.childNodes[0].childNodes.length;
        for (i=0; i<_global.mynews; i++) {
            // Var for attaching a news item
            newsitem = newslist_mc.target_mc.attachMovie("newslink_mc", "trackclip"+i, i+1000);
            // Position news list
            newsitem._x = 0;
            newsitem._y = 21*i;
            // Set the text field to equal the XML values of latest news items
            newsitem.date_txt.text = newsNode.childNodes[0].childNodes[i].childNodes[0].firstChild.nodeValue;
            newsitem.title_txt.text = newsNode.childNodes[0].childNodes[i].childNodes[1].firstChild.nodeValue;
            newsitem.main = newsNode.childNodes[0].childNodes[i].childNodes[2].firstChild.nodeValue;
            newsitem.onRollOver = function() {
                var newsColor = new Color(this);
                newsColor.setRGB(rollOverColor);
            };
            // Show the original state
            newsitem.onRollOut = newsitem.onReleaseOutside=function () {
                var newsColor = new Color(this);
                newsColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
            };
            newsitem.onRelease = function() {
                // Reset text fields
                resetBody();
                // Set main body to newest news item
                maincontent_mc.target_mc.title_txt.text = this.title_txt.text;
                maincontent_mc.target_mc.date_txt.text = this.date_txt.text;
                maincontent_mc.target_mc.body_txt.htmlText = this.main;
                // Redefine scrolling vars
                maincontent_mc.scrollList();
                // Enable all news items
                for (i=0; i<_global.mynews; i++) {
                    newslist_mc.target_mc["trackclip"+i].enabled = true;
                    // Reset colors to original state
                    var newsColor = new Color(newslist_mc.target_mc["trackclip"+i]);
                    newsColor.setTransform({ra:100, rb:0, ga:100, gb:0, ba:100, bb:0});
                }
                // Disable current
                var newsColor = new Color(this);
                newsColor.setRGB(rollOverColor);
                this.enabled = false;
            };
        }
        // Disable current year because it's already loaded
        yearlist_mc.yearclip0.enabled = false;
        // Set current year to new color
        var yearColor = new Color(yearlist_mc.yearclip0);
        yearColor.setRGB(rollOverColor);
        // Set current news item to new color and disable
        newslist_mc.target_mc.trackclip0.enabled = false;
        var newsColor = new Color(newslist_mc.target_mc.trackclip0);
        newsColor.setRGB(rollOverColor);
        // Update main body with newest news item
        maincontent_mc.target_mc.date_txt.text = newsNode.childNodes[0].childNodes[0].childNodes[0].firstChild.nodeValue;
        maincontent_mc.target_mc.title_txt.text = newsNode.childNodes[0].childNodes[0].childNodes[1].firstChild.nodeValue;
        maincontent_mc.target_mc.body_txt.text = newsNode.childNodes[0].childNodes[0].childNodes[2].firstChild.nodeValue;
        maincontent_mc.scrollList();
        // Update scroll vars
        newslist_mc.scrollList();
    } else {
        trace("Cannot load XML");
    }
};
// Load XML
kunderXML.load("http://blomquist.edited.se/rss_modify1.php?rss=http://blomquist.edited.se/index.php?option=com_content&view=category&id=40&Itemid=71&format=feed&type=rss");
// Function for fading in clips
function fadeIn(clip, speed, val) {
    clip.onEnterFrame = function() {
        clip._alpha += speed;
        if (clip._alpha>=100) {
            clip._alpha = 100;
            delete clip.onEnterFrame;
        }
    };
}
// Reset all main body fields
function resetBody() {
    maincontent_mc._alpha = 0;
    maincontent_mc.target_mc._y = 0;
    // Fade it in
    fadeIn(maincontent_mc,6,100);
}
// Reset news item list
function resetList() {
    newslist_mc._alpha = 0;
    newslist_mc.target_mc._y = 0;
    // Fade it in
    fadeIn(newslist_mc,6,100);
    // Remove old clips
    for (i=0; i<999; i++) {
        removeMovieClip(newslist_mc.target_mc["trackclip"+i]);
    }
}

I am guessing that since it's a xml feed, the xml file is not possible to take measure from, so the preloader doesn't really know how big the file is. Is there any good workaround?
The site's dev-page is Blomquist Annonsbyrå AB

[alxpalm]

Anyone? Please?