Maybe you can figure out what I'm going to make before I reveal it, but I need some information:

What items can you get from the boxes?
What items can you get from the crates?

Maximum Damage from? Gernades, Mines, Missiles, Homing Missiles, Sheep, Dynamite, Banana Bomb, Shotgun, Firepunch, Kamakazi, Uzi, etc.

I'm pretty sure I know most of those, but would be nice to list.

Anywhere I can get worms graphics to use for a "personal use" document?

There is a weapon FAQ here with damage amounts:
http://www.gamefaqs.com/console/xbox360/file/937709/47510

You can get jetpack, teleport, girder and rope in utility crates. Weapon crates have everything else.