Why would you want to have XP on both hard drives?
David, to answer your question, I made it a dedicated movie editing drive. I removed all programs that were not needed and it allows me to edit movies and pictures without loss due to some background transfer by some garbage program. If you had worked for hours on editing and then lost all that due to some program running in the background....I think you get that. and before someone jumps out...please note that all my copies of any OS that I have installed are registered and installed under different licensing.