write your own sh-t, period.
if you need to jack, tell everyone about it...it's all a mater of "intellectual property" and "copywrite".
Those "royalty free" loop cds are fair game, but i agree with dirty on this...use of them would seem to boil down to lazy and sometimes unimaginative programming.
slag me if you like, but why "throw one in and mash it up to fill the space" when you could load up a drummachine or synth yourself and throw in your own loop to fill space???