You'll need to do it from the cmd line obviously, theres an article on it here:
But basically you need to browse your registry using regedit, and find the uninstall string for vmware tools from the following location:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
In my case it was:
MsiExec.exe /I{3B410500-1802-488E-9EF1-4B11992E0440}
But it probably depends on what version of vmware tools you are running, so check yourself