ok, I posterized a texture then edited it... is there a way to (de)posterize it back to the normal colors but with my edit intact? or is simply "Undo" the only way?

Thanks in advance,
Demo

I don't get what you mean... thanks anyways, I just wont repaint it how I was thinking.

"I don't get what you mean... "

Gee, and I thought it was fairly straightforward 

1.) Step Backward command on the Edit menu
2.) make changes to a New (Adjustment) Layer
3.) Creating Duplicate Image

There, now surely one can understand this; provided of course, they have PhotoShop in which they can experiment with said (basic) commands.

There are several onliine PSD tutorials; here's one:

Before you start please read this. GO SLOW and follow this tutorial and all books carefully. Learning Photoshop does not come over night. The more time that you spend in playing with Photoshop you will understand it more.
  -- Tony Hertz

Good Luck and have fun . . . I am.