Waiiiiit... I found something that might work. You can't pick up items, but you can spawn them, but as long as I give players the items with events, that should work. It's really annoying, though, because I want players to be able to grab items they drop on death and such.
I'd still like to be able to keep players from spawning items, though. Anyone happen to have Kalphiter's mod? (Also, the link for the thread is broken for some reason. Dunno why.)