Vmware

Instead of editing your .vmx file, you can use the VMWare Tools to enable/disable synchronisation of the time with the server:

The latest VMWare Server is only supporting Web Access for configuration including console access to a Virtual Machine.

There is a Firefox Plugin for the remote console, but that did not work in my setup. After installation of the plugin the Web Access will no longer complain about a missing plugin after installation, but the console will not start either.