one very useful thing about the way that BIAB incorporates loops is that ANY snippet can be looped.. you aren't locked into using commercial loops with the right header.

So, if you can...
1) record a few bars of a sound you want to use,
2) then hilite it and save it as an audio file
3) then copy the audio file to your LOOPS directory (assuming you have a version of BIAB that is new enough to include loops)
4) when you add a loop, select the snippet you made... the dialog box that appears will give you the opportunity to declare the info that would normally be embedded in a loop's header. Depending how you enter those values your results will vary.. so just play around with it

Looping is an EXTREMELY powerful feature that hasn't gotten the exposure it deserves on the user showcase... but I think it's about to. wink I look forward to hearing what you come up with!