If it's a W2k3 it should work no matter the version or edition.
Aren't you able to mount the VMware tools?
If not, the usual ways I think that they use VMware tools.
A thing you can do is, to create a new vmdk, attach it to another server, put the VMware tools package there, then attach it to your server.
And try to install it from that hd.
This, it should work.