Xml photo gallery

Hi,
I have one category set up to load photos via xml.
I want to be able to click on another category and load another set of photos.
How do I set up my actionscript to do this?
Should I use the same xml file, or make a second one?
Thanks so much!

you can access the file here:

ftp.fatcow.com

username: dgc
password: dgc