I have created a few dynamic groups that have seperated our Windows 7 x86, Windows 7 x64, and Windows XP physical machines.  I would like to be able to deploy patches (and software) to only the PCs listed in each of these dynamic groups (because a search of Windows 7 x86/64 also brings up several virtual machines that I do not want to patch).  When doing patch deployment, I see that the staticly created custom groups are available for patching, but the dynamic groups are left off the list of available custom groups?  Am I missing something or just taking the wrong approach?  Any help would be greatly appreciated.

Thank you!