May I suggest the following download categories for better organization:
mods: Big mods that entire new features to the game. Examples: Zombie, team DM, fire fighting mod.
minimods: Mods that effect the game in a specific way. Examples: No to far, reload cheat prevention.
Items and weapons: Weapons and items to have fun with. Examples: flame thrower, shot gun, ion cannon. NOT the duplicator, that would be a tool, and go under mods.
Vehicles: Vehicles, need I say more? Examples: Stunt buggy, stunt plane.
Maps: maps, need I say more? Examples: corp office, ice pack