Shortcut Keys

[Nik]

I know this is going to sound really dumb, but the other day i was messing around with the registry without backing it up (eeek) and i accidentaly deleted the string that allowed the
shorcut keys for stuff on your desktop (for instance ctrl+alt+x to open explorer) and i was wondering if anybody knew which key it was so I could add it back.

thanks!
nik