What do these folders do. There seems to be overlap. For example, we're told we should move the su file from bin to xbin before upgrading to Froyo. Do applications that need the info know to look in both bin and xbin? What would happen if I copied su into xbin and left it in bin instead of moving it? I've also seen posts recommending placing Busybox in both bin and xbin. Please help u-confuse this newbie.