how do I reinstall PT8?

[Audio85]

I'm going to give a quick story of what's happen to me. In June 2009 I bought a Mbox 2 w/ PT 7.4 and a free upgrade to PT 8. Now 2012, I just purchased a Digi 003 Rack+ connected via firewire 400. I was having a few issue with the 003 or the PT software, which one....I couldn't figure out. For example, when I would try to import audio, PT would "unexpectedly quit", when I would try to record audio, PT would "unexpectedly quit".

So I thought maybe my drivers were reading the 003, since I had the Mbox so long, PT only recognized the Mbox. So I stupidly UNINSTALLED PT8.

Well I reinstall it and now it still "unexpectedly quits" but my main concern is...how do I get my PT8 back? I still have the original email with the authorization codes and documentation when digidesign/avid sent me the info for the free upgrade.

Additionally, if I can get PT 8 back, how do I get PT to cooperate with the 003? Do I need the correct drivers to get PT to talk to the 003. I read that PT 8 comes with the drivers already for it to work with the 003?

Help me please!!!!!!