I decompiled, removed all unneeded entities and brushes like triggers, adjusted the sky and lighting, put in TTT weapons and recompiled.
http://www.mediafire.com/?mvtwzmdtmnt
There are slight problems with the lighting in one or two areas, the lights don't light certain brushes properly but this is only cosmetic.
There are 16 pistols, 2 rifles and 2 shotguns.
There are roughly 5 deagles, 3 Macs and 4 incendiary grenades.
Ammo is sparse and scarce, so whoever gets the ammo first will be at an advantage.
Have fun.