Logic Pro 8 Ignoring Key signature for imported audio loops


Hi gang,
I'm trying to bring in some Bass loops (not apple loops, but 3rd party acidized Aif files) into my session. I have different loops in different keys, eg. one loop is a riff on E, and the next loop is a riff on Db. Logic 8 is conforming them all to C which is the song key, and transposes the loops to C. Is there a way to tell logic to ignore the songs key and play the loops in their original key?
Or am I stuck to writing key changes all over the place?
Much obliged as always.