Sorry I was away.. again lol. Flash is what you do in fastboot. If you don't know what that is nvm. Just put the recovery into the sdcard and load it into the phone. BTW are you using Recovery Flasher? See if the apps return (very unlikely to me). If they don't, get into recovery mode and Nandroid backup. Then apply Cyanogenmod again. The CM file should be on the root of your sdcard.
This can get you familiar with fastboot. You won't have to use it if you didn't use it when you rooted your phone. Flashing is replacing some software on the phone with another. Have you noticed Recovery "Flasher?" Just in case you use it. Tell me if unclear. I might be away for some time though. Sorry