I see, if I am reading your comments correctly you were trying to use NetbookCD to boot into your damaged installation on the Mini. Probably won't help too much there.
However, NetbookCD can help you get into the Mac OS X Install DVD and thus Disk Utility (or the Terminal.) I know you said it didn't help there, but there are a few things to keep in mind. First, you have to swap the discs, press F5, and then it should replace the NetbookCD icon with the Mac OS X Install DVD icon. If it doesn't, that's where the disconnect trick comes into play. The trick is after NetbookCD loads to the Chameleon boot screen, you swap the discs and unplug the drive from the Mini, turn off the DVD drive power, then turn it back on and reconnect the USB cable. Press F5, and it should work.
Give that a go, and let me know how it works.