I've always wondered at how you can get the characters "break out" of the actual signature border.
When using a art program, make the background transparent, then put a picture of whatever on it, when you save it, save it as a PNG.
JPEGs just show transparent parts as white.
Just a png? I like animated images... can't you save it in .gif format?
GIF files d the same thing, but I see no reason to use it unless there is actually animation in it.
And most people I see do not have animations in pop out siggies.
But you can if you want.
Here is a extremely quick animation I did with it.
Turning things into animations can sometimes lower the quality. o.O
Sometimes.....