Disabling Host Time Synchronization!?

Hi!

I'm trying to disable the Host Time Synchronization feature, and have found various post around the net, telling how to do it.
In Virtual PC 2007 it worked just fine, but with Windows 7 Virtual PC I can't get it to work!?

This is one of the modifications floating around the net which should be edited/inserted into the .VMC file, but my VPC still syncs the time.

Anyone who has a working solution!?


<hardware>
<bios>
<time_sync_at_boot type="boolean">false</time_sync_at_boot>
</bios>
</hardware>

<integration>
<microsoft>
<components>
<host_time_sync>
<enabled type="boolean">false</enabled>
<frequency type="integer">15</frequency>
<threshold type="integer">10</threshold>
</host_time_sync>
</components>

Can't you just disable the Windows Time service in the XP mode?