Left 4 Dead 2 Support Error

Hello. I have been having issues with getting L4D2 to work on Garry’s Mod.
The bad part about this is I have Left 4 Dead 1.
So that means I get the models for that game.
The only problem is that certain parts of the survivors are invisible
(Zoey: Missing Shoe, Louis: Missing Tie. In gen, all missing eye texture)
And also only a few props appear visible. And all of the special infected are invisible.
Please help me!