Actually... given the fireball and Matt and Alex are two seperate layers in that pic, I CAN break it into a standalone minmalistic wallpaper... I'm not sure about flipping it, though; in the comic, Alex is left-handed, and flipping the pic would make her throwing the fireball with her right hand.

Still innerested? I can probably do it fairly easily if you let me know what resolution you're looking for and how small you want Matt, Alex, and the fireball to appear on the wallpaper...