Since I spoke about DISM in the last post, I wanted to highlight my personal favorite new DISM command.
DISM.exe /Image:C:\test\offline /Cleanup-Image /RevertPendingActions
Where this is handy is in situations where you have installed an update on an installation and the machine gets stuck applying "Stage 3 of 3". You can boot into WinRE in Windows 7, run this command against the installation from the command prompt and it should allow you to rollback the changes that the update was attempting to apply. When you enable this command and reboot, you should see a blue splash screen that shows the updates being reverted.
So, something cool for everyone running RC to play with while we finish up Windows 7. More DISM stuff to come soon.