Steps I've done:
- Downloaded & copied CM7.2 to my SD card (from here)
- Installed the Android SDK
- Downloaded & copied the ClockworkMod Recovery to the platform-tools directory in the SDK folder (from here)
- Rebooted my phone by holding down the volume-down and power buttons
- Went into fastboot mode
On my laptop I ran "fastboot oem unlock", then ran it again to make sure it really worked

On my laptop I ran "fastboot flash recovery recovery-clockwork-5.0.2.0-passion.img"
This is where I get the error "remote: signature verify fail"

Anyone know how to fix this?