Left 4 dead model help!

I downloaded models of the characters in L4D but when i Spawn them they are black/pink…

How do I fix this problem?

Missing texture, put the file in the gmod and let it over write again. It may be caused by incomplete file in the folder.

I delited all the files to the models and replaced it with new but now its only Errors >:(

I puted them in my garrysmod folder, in gamemodes/sanbox/centent/materials and models

what am I doing wrong?

you put it proabaly in garrysmod/addons