Dev - Also, on form submission, use GD to resize the image as a new thumbnail file
Dev - In the submission form, you can now upload a banner image
Sprite Splitting Script
It takes a sprite and a line and generates two new sprites, one on each side of the line.
Press F1 for info and demo controls.
Have fun cutting creepy four-eyed people apart!
(It takes a moment to generate the sprites. It's unnoticable when cutting a few things apart at once, but if you have a slow computer, I would not recommend trying to reproduce screenshot #3. =)