I have read through the forums and could not find the difinative answer to my question. My wife had a XP Pro PC that had hardware failure. The HDD with XP is still good. Wife needs to utilize programs on the XP HDD which are licensed to the HDD serial number. I can't transfer the programs to Vista PC without loosing licensed software. I have a good Vista PC using a SATA HDD. It has an open IDE port that I can connect the XP HDD to. If I could install this XP HDD in the Vista PC and make the Vista PC dual boot she could still use the licensed software on the XP HDD. Can this be done??? If so lend me your suggestions. This will really get us out of a pinch until I can make arrangements to purchase updated software this summer.