Probably a full system rebuild (of software) XP uses a hard drive file
system of NTFS, which you cannot (i believe) install windows 98 or ME on to,
this means backing up wanted data, booting from a win98 floppy, removing
partitions, creating FAT partitions and then installing windows 98 or ME,
quite frankly its a timely process, and its not a nice one, i can't see why
you would want to go back to the systems that will display a "Blue Screen Of
Death" at least 3 times a day, fall over and die for no reason about 12
times a day, give you a headache with problems...etc....i'd stick to XP!
Jason