2 Different UI setups on 1 machine?

[ZDamned]

(NOTE TO MODS: Please delete this if it has been answered, I never checked the rest of the board for info on it.)

Not sure if my title explains it well, so I'll be very specific here.

I have my Game running in 1920x1200 Resolution on my laptop. My UI is almost all customized, and the pieces fit in like a puzzle the way I have it working. (I'll poste a screenshot in a few and edit this actually.)

What I Want to know is if there is a way for me to create a second loadable UI for when I go into Windowed mode to Chat on AIM while I play. When I go into Windowed mode everything overlaps eachother and the whole UI becomes useless.

Any info on this will be greatly appreciated!