Just get a pwned 2.1 3G firmware? My iPhone is already "PWNED", so can i just restore using a custom 2.1 3G iPhone firmware?

Also here are the details to the torrent:
Iphone 2.1 firmware, pwned. Includes Cydia, Cydia, SSH and Terminal. No custom logos.

Put iPhone into recovery mode and flash from iTunes.

All thanks to the iPhone Dev Team!!

(Sorry previous file had incorrect IPSW file, all sorted now)

Also as a side note, i have iTunes 8, if that matters.