Simple XML tutorial

So I’ve developed a rather simple flash site that works relatively well…until you upload it and try to view it from another computer. The galleries in this site are HUGE and the client wants to keep them that way. Loading external swf’s don’t help because each .swf is still 3mb a piece.

What I am looking to do is build these galleries using xml now. I found one tutorial that didnt pan out for me. All the other xml tutorials on this site don’t seem to be helping me with the one specific issue I have. Is there anyone out there that has any advice on this or know where I can find a simple XML tutorial? All I want to do is build three galleries with dynamically loading content.