Headhack Help

I have a problem I hope someone can help me with. I want to replace the head on one of my Alyx models with Zoe’s for use in Gmod. So I searched here and found a tut that explained everything nicely but when ever I use StudioCompiler to extract the Zoe model it crashes but it extracts the required Alyx model no problem.

I’m not really sure what the problem is because I’ve tried extracting several different copies of the model from several different downloads from garrysmod.org and even extracted the model from L4D’s own files and each time, same crash.

So if someone can help me figure out whats happening or suggest a different program to extract with I’d be very grateful