It would help if I had a little more information on how it seems to freeze.
Mine did have 1 problem during install (meaning a virtual OS not vmware itself) where the screen appeared to go black and that was it. I even managed to BS around it (don't remember how) and then had major graphical problems while actually using the virtual OS.
Turns out it was xfree86
Upgrading xfree86 to 4.3 fixed the problem and haven't had another since.
So if this sounds familar I'd recommend trying that out
Also, their site has a nice support page