Server Hacked - Impex Used - Thread IDs Changed - Google Hates Us Now

[netpants]

So because we had so many messed up plugins installed we couldn't just restore the old database we had to use the impex tool to import the old database. When doing this we got screwed because all of the thread IDs changed.

So we essentially have 25k+ Indexed pages that are 404 ing or just going to an entirely different thread. Google will not -reindex the new thread id threads because its thinking its duplicate content.

Is there absolutely anything we can do to get old thread ids back.

Oh yea forgot to mention because we had the forums open, new threads have been created. So if we try to restore the old database to get the old thread ids back to where they belong we will essentially end up with duplicate thread IDs at some point.

Please Help!If possible.