While the drivers for all versions of XP are, I believe, the same, you need to think hard about how you reinstall them. If you have all the drivers - in their original form - stored in a folder somewhere, you should be fine. Or: use a program like DriverMax to find and store all your drivers for you before making the change. How were you planning to get them from the slave drive to the new master drive?
Sony Vaio Z Canvas release date, price and specs: Another Surface Pro rival but for the US