[SundayDuffer]

I used ROM Manager (free version from Market). Download the ROM you want to flash and paste that ROM on the root of SD card. Open up ROM Manager, choose "Install ROM from SD Card" and off you go.
Neat little app...you can reboot into recovery mode from the app also..there you can just use the volume button to navigate...
Anyhow, either way is fine..they both are very easy.

Those guys are probably right...you might want to flash your ClockworkMod Recovery again. BTW, you can do this with ROM Manager also.

Happy flashing.