You can download it direct from here to your PC:
http://android.clients.google.com/pa...ase_222219.zip
Rename to update (most likely) or update.zip depending on how your computer handles file extentions (most PC's automatically add the .zip so if you add it again you end up with update.zip.zip). Place newly renamed file onto SD card, goto hboot, use volume keys to highlight recovery, the power button to select. Now press volume up to get list of recovery options. Use volume keys again to scroll to the update.zip option and press power button to select, don't interrupt the update. It would be wise once you're booted back up to do a factory reset IMO.
I think there were 3 possible updates:
1.) 4.06.605.2
2.) 4.06.605.3
3.) 4.08.605.2
You'd only use the above method if you were sitting on 4.06.605.3 already and failed the final leap to 4.08.605.2. Unfortunately, it's more confusing than usual due to the mulitple patches.