Hi!
I had built a theme and now i want to create new colours schemes/flavours. Can i do this using my current images? I mean, without drawing everything from scratch. I would like you to suggest a program (commercial or not) and the command to do it (in the program), or the concept to do it. I'm new to graphic design/manipulation, if you know of some tutorial page i would appreciate.
I’m currently using PSP.

photoshop, use hue - saturation (under the *image* menu).

I believe PSP has the same function, but I use photoshop as well, so i can't tell you exactly where it is.