How can I restore a broken user after a System-Recovery?

I recently tried upgrading my PowerMac G4 from Mac OS X Tiger to Leopard, but the Mac crashed in the process and all seemed lost. However, with a system recovery, I managed to get everything back. At least, almost everything. I still had to create a new account, and this account was missing the addresses from the previous account in Addressbook. Addressbook was empty. Addressbook used to be filled with addresses from 2 accounts. I managed to recover the addresses from one account, but the other seems inaccesible. I tried restoring the account. Empty. I tried copying the files and giving myself read/write permissions. Nothing. I tried showing hidden files.Nothing. Does anybody know what's going on here? How do I recover this account/the addresses from Adressbook (I don't really care about the other files on the account).