Here's a template for making Character Parts.

[Qwertygiy]

It's in the 80 x 120 format. To use it, simply open it "as layers" with your image editor. (If you're using MSPaint, which doesn't support layers, I say to you: Why the heck are you trying to make an overlay without transparency?!)



Link: http://i40.tinypic.com/54hiyw.png