Try this link.. however i'm not sure if it STILL works .. but the ammoboxes have not changed so i think at least they should be placed by this pack. http://forums.alientrap.local/viewtopic.ph ... light=xmas
As for why your weapons stop working: Either you got a bad build (i guess not, nex is mostly stable) or maybe some variable was changed/renamed or similar stuff. Try to rename/delete config.cfg and also try to make sure no other .pk3 files can interfere (aka just try the beta build, if on linux/mac rename ~/.nexuiz so everything is really clean.. for example some maps gforce1-4 ship with custem progs.dat to have the turrets and they can overwrite the 'new' code from the beta build..)