I recently installed win xp on a new hard drive....while having the old drive pluged in.The os on the old system was Xp too.Now....the not so fun part is this....I formatted the old one...hoping to be able to make my new one a master and he old one a slave.It doesn't work.Alone...the new hard drive...works...win xp works...everything is just as it should be.If a make it a "master where slave present" and make the old one a slave....I get the ntdrl error msg.The old one is still disk 0...and the new one is disk 1....in bios.It gets even crazier.....if I make the old one a master and the new one a slave....then I can initialize win xp and i can see the old hard drive....Can anyone tell me how to change disk 0 to disk 1 ?