WS 6.5
Disabled all time synchronisation via both the VMTools applet and the VMX file itself.
Set the rtc.starttime parameter so it always starts in Oct 08.
I have also disabled the Windows Time synchronisation .
Relevant portion of VMX file reproduced below.
tools.syncTime = "FALSE"
rtc.startTime = "1224871200"
time.synchronize.continue = "FALSE"
time.synchronize.restore = "FALSE"
time.synchronize.resume.disk = "FALSE"
time.synchronize.resume.memory = "FALSE"
time.synchronize.shrink = "FALSE"
time.synchronize.tools.startup = "FALSE"
http://communities.vmware.com/message/1103292
http://sanbarrow.com/vmx/vmx-always-start-tonight.html
http://communities.vmware.com/thread/115436
