You need way more help than you're going to get in a reasonable time over a forum like this - I recommend calling in a SQL consultant (not trying to get business - I'm not available right now) to help you or if you don't want to spend so much, call PSS and see how far they can get you. I suspect you're going to have more trouble than just what you've hit so far so should have someone dedicated to you for a while.

And get a backup strategy!

Thanks