Although the M$ product works I would really suggest you take a look at VirtualBox by Oracle/Sun Microsystems.
Note: FreeHal may still have a restriction on the number of VMs allowed per machine. IIRC it was limited to 2 VMs per physical system.
Looks like FreeHal site is down I can't upload completed WU's or hit their site.
Let's hope it up soon.
It's up now. I just got some WUs for each cruncher.
In case it is not obvious...if you choose 'cpu intensive, one per core' in your preferences, FreeHal will share each core with another running project instead of using that core for only FreeHal. This will allow you to run 2 WUs per core. This may be your preference or maybe not. It may not be a 50/50 split on core resources. I can't remember if it was this way before the project went on hiatus or not.
Back for me.