so i've been deleting music that i've had in my collection to make space on my pbook 100gb HD. kept going down to under 400mb free space, then back up to 3gb, and back, etc. would it be smart to just put music and photos on an external to free up massive amounts of laptop hd space? how would i do that keeping all the playlists, ratings, settings, etc. in itunes (and iphoto) intact? the issue with keeping it on an external is when the laptop moves, the music doesn't move with it? what do yall do about this?