Followed instructions and everything was ok up until Option 1:
“Once you have the 2.2 OTA installed you can download the clockworkmod recovery …” Downloaded, placed PB31img.zip file into SD root, then HBOOT gives a series of “wrong image” errors.

PB31DIAG.ZIP
no image!
PB31DIAG.NBH
no image or wrong image!
loading…PB31IMG.zip

Help!