Suggestions

[Maxpphire]

I also have to ask... if there were to be a video game artwork section, would wallpapers and such be acceptable?

The wallpapers I have of some characters from a game I rip from are some of the highest-quality art of them I've found from the official Japanese website.

All the wallpapers and other art I have are anime-style, BTW.

No, unless the wallpapers come from the game they wouldn't be allowed.

It would also be a good idea to ask the contributors to include on their sheets the name of the ripped game and the system it belonged to.

Honestly that is up to the contributor themselves, it is kinda with having them label on what is what in the sheet, they don't have to regardless of how helpful it might be.