If you haven't already discovered how much Realband gives you used in conjunction with BIAB I suggest you experiment. BIAB and RB together are really powerful for creating music. Lots of us use RB rather than some of the better known DAWs. Its free with BIAB and opens up lots of creative avenues. You won't save much space as Matt says so unless every meg of disc space is precious why not try it rather than delete it?