Okay so i got tired of Xp pro and installed xp home on another hard drive so that I could copy all my files from the one with xp pro on it over to the one with xp home. Well the one with XP pro is still considered C: drive so I can't format it. I've tried taking it out of the start up process in the bios but then it tells me no OS found. So while I have both of them in there every time I start up my PC it asks me which OS I want to load Pro or Home. They both work, but pro is taking up one of my 40 gigs and I'd like that disk space back! Any help would be hot!