cdi

i have xp on d: and os 98 on C: i want to format and reinstall both ones to speed up my pc how ?pls help p.s. what is a boot cd(i hav got xp one)

hey guys this is in reference to the march 2005 dvd can anyone tell me how to play the knoppix live iso image from that???????????i tried everything except writing it to another cd(i dont have a cd writer)....i tried to boot it from copying it to a blank hard disk also.......