I've been going through some tutorials, but i have two problems -

i'm making a simple poly character, with a square for his hand, in a fist shape. so imagine a six-sided fist, thumb on one side, knuckles, palm, etc. i opened up the square in the UV texture editor, and it was unfolded into a T-shape, six sides. makes sense. but when i made a UV snapshot, it was just a square. i tried to make my own T-shape fist pattern in photoshop to apply to the square, but i can't figure out how the square is unfolded, and where to draw each side.

so my questions are -
1) how do i take a snapshot of the UV texture editor, so i can see the proper shape
2) how do i know where to draw on it

i'm applying the texture to a finished full joint animated character, but that shouldn't matter, right? you should be able to change textures at any given point, right?

thanks