There is a fix to make the vmhgfs-module working. This is all described here: http://laptopbisnis.blogspot.com/200...re-fusion.html
The page is originally for fusion-users, but it works also for Workstation 6.5.2 (that's what I'm using). You have to extract the vmghfs-only folder and edit the page.c file as described. After re-taring the whole thing you run the install script. If you get an error message saying something about having to delete some files, do it. In my case it's:
After that you can run the installer without problems and all the modules build and work.
sudo rm /lib/modules/2.6.28-11-generic/misc/vm*