ActionScript 2.0 :: Dynamically Loading New Different MovieClip

Imagine a database with a table of some items. Each item has 5 images inside and some other fields. In flash I have a page that duplicates all the items and shows them by thumbnails and a view button for each item. The movieclip that does this is for convenience movieclipA. When I press on the view button of an instance of movieclipA a duplicated movieclip takes place that has all the values of the specific item except of the images.

This movieclip - movieclipB duplicates for each item. This works perfect. I also have another movieclip movieclipC The movieclipB is a slideshow and loads the 5 images for an item by a self generated xml file that a php functions produces, depending on the querystring that is the idstring in my actionscript. I mean that inside the movieclipB I do

Code:
my_xml.load("findphoto.php?id=" + idstring);

So far the movieclipB works very well standalone...and this means that if I assign the querystring value inside the movieclip (for example idstring=1 and then call the function as above, the slideshow works verywell. How to pass for each item a different idstring into movieclipB and where exactly to put the movieclipB so it can be duplicated with movieclipA and take the correct idstring to do its job. Everything I tried to pass the idstring failed.

In the flash page among other code that I don't believe it's important, I have the following actionscript in the action layer
Main page frame 1:
PHP Code:
total = showPost.total;
var id:Array = new Array();
var headline:Array = new Array();
var details:Array = new Array();
var thumbnail:Array = new Array();
showPost = new LoadVars();
[Code] .....

VisitorsDetailsClip_mc is the movieclipB I mentioned above. MovieclipA (the one with the thumbnail) and movieclipB are placed on the stage of the main flash page.