preloading multiple dynamic images

I've searched this topic for hours with no luck. Basically I have an XML file with a description and the url of multiple images. When I play the flash movie the nodes of the XML are loaded into an array and then each jpg is then loaded and attached to a movie clip along with the description using a for loop. The problem I'm having is that when making a preloader it only preloads one of the images. OR if I use an external preloader, the swf file is preloaded but none of the images are. Is there a way that I can preload all of the images or preload each movie (with the image and description attached) in the for loop? Thanks!