I think if he deleted the CLockworld file in its entirety, he needs to go to the market, uninstall RM and then reinstall it to be safe. If he was inside the CW\backup folder and deleted his backup then he's fine.
And then use it to flash SPRecovery in so he can ditch it and just do things the "hard" way. :P
Okay, enough of my chiming in. Officially unsubscribed now. Good luck!