Old Z1 damaged beyond repair by thieves........Grrrr! Purchased a used head unit and want to put my hard drive from the first unit into the new one. I got the "hdd cannot be used" error. 

I upgraded the old one to and 80gig and it has a ton of music on it.

What do I need to do to make this work? Unlock it again? Can I do it while it is the new unit or does it need to be done hooked up to my PC? I know this question is probably been addressed before, just direct me to that link. Thanks for all your help.