Just to further Daryans post, don't bother "stretching" the tracks....it is a pain in the ass, and not easy. I have done a few matrixes (sp?) and the easiest and most efficient way to do it is to cut the SBD wav into tracks, and then use a multitrack program, like Cool Edit to line it up, track by track, increase the volume of the SBD track if you want, then mix it down. Good results are not difficult to come by using this process.
Nick