whack the tire off, undo the massive nut in the middle 32mm or so after removing the safety pin (get someone to apply the foot brake) undo the lower ball joint again after removing the safety pin whack the drive shaft out of the hub. undo the metal clip from the joint and knock the old joint out apply new boot etc and redo on the other side. use the metal clips and if possible genuine boots in my opinion the metal clips ensure piece of mind and the genuine boots look and feel as they are way better made than the chaep pap you can get.