For those looking for some help getting commercial skipping working in 7MC two guides were published last week.
Thanks to Mike and Ben for doing my least favorite job (creating documentation) for me.
One thing that needs to be added to both, and this is completely my fault since I forgot to add it to the installer. If you use an extender check that "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Service, AlwaysUseFPD(DWORD) = 1".
Hopefully I'll remember to put it into the next rev :)