I assume you've already upgraded Acrbat?!
For anyone else looking to upgrade, why remove XP? As long as you have enough disc space just install as a dual boot so you have all the legacy compatibility of XP and a new OS to play with
Look no further than here: http://apcmag.com/5023/dual_booting_xp_with_vista
I did this and it works flawlessly on my Raid 0 config.