[dba-Tech] VMWare and Virtual PC 2007 on same machine?

I am in a training class and the instructor mentioned that MS gives you
permission to run a copy of XP in a virtual PC VM.  I already have VMWare
Workstation 5.5.  I would like to be able to run extra copies of XP pro if
possible.  

So, can I run  both VMWare 5.5 and Virtual PC 2007 on the same machine?  I
would not try them at the same time.

Thanks,
Bobby