I've got a very serious problem and I'm hoping that someone will offer to needed help to my question.

I just recorded a live concert using my Cubase SX set up. Apparently, I must have recorded the entire show at 32 bits. Well, that doesn't seem to work well with my Delta 1010 LT cards when trying to play back, mix etc. WHAT DO I NEED TO DO to fix this problem. What software do I need to buy that will convert to 24 or 16 bits from 32 or is there a way in Cubase possibly to make this convertion as I have yet to figure it out. I was literally sick when I noticed what I had done as money has already been paid. HELP!
C.