I got a hold of and replaced the pak files but still no models... any other ideas?

I'm running windows 7, 64 bit and just ran the 0.7.0 installer. I might not have all the pak files is there anywhere I can get them?

Hey guys,
I used the 0.7.0 installer on source forge installed it and ran the game perfectly. but I appear to be missing models for the turrets, acid tubes, dretches and seeing you gun when human. any ideas/help would be much appreciated as this makes the game near unplayable...
Thankyou