I have been trying to get vmware-tools installed in my Vmware Fusion OpenSolaris 2009.06 guest OS for some time now at no avail. My experiences are the same as this thread on the VMware forums, and I was hoping someone here would have a solution.
I followed that exact fix in the forum post and it works well enough for me. It doesn't give you all the tools features for X, but it does give you clean guest shutdowns (and the eth driver in OpenSolaris 2009.06 already gives you 1000 throughput).
If you're looking for X support, you'll need to contact vmware.