Actually, I doubt that.
The weapon.def file is inside the pff file, and the file is over 200Mb. It would be insane, if PB should scan it, because of the size... it would defitinitive slow the comp down.(client)

PB, as far as I've read and tested, is punting when the def-files is just posted in the game-dir, and not in the pff-file.

Anyway... It'll give host-masters (including me) a hell to discover theese cheats, escp. in matches... AAAAAAAAArg!