It should work.. i can't download version 4, maybe filefront has some problems?? But i changed the version 3 pk3 i had: http://esteel.planetnexuiz.de/nexuiz/mi ... esteel.pk3
It works perfectly if i start my game like this: ./nexuiz +exec turrets.cfg +map gforce3
What i changed was: renamed progs.dat and progs.lno to progs_turrets.dat/lno and added a line to turrets.cfg: sv_progs progs_turrets.dat