Virtual Box : Time machine

I've been digging Sun's free VirtualBox over Microsoft's Virtual PC, and not only because of the Snapshot branching functionality. Here is how to disable the time in the guest operating system from syncing with the hosts, which is great for testing various scenarios.... vboxmanage setextradata vmname “VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled” “1″