I bought the cusl2, and a 45 gig 75 gxp. Now I'm installing them into a new tower, BUT I want to use the hard drive I have now to transfer over some of my files/mp3/proggies. The thing is the hard drive I have now is a really old maxtor. I don't even think its ata33. What I need to know is if it will work with the ibm at ata100 even thought its not ata100? Or will I have to disable ata100, then transfer over everything, then enable ata100 again? Or does it even matter and I'm worry about it for nothing?