Oh, haha.
Well, now I know how it feels to be you... except that fortunately for me, the color palete in Diablo 2 that's used for the skill trees and icons is quite similar as what MSPaint gives you, so... ya.
Gah, no one will help me... on any of three boards...
EDIT:
Hm... I just thought of where I could look. Also luckily for me, Diablo II has much more organized *.mpqs, one for any of many things, including the standard data and patch files. Whee!