Syncing separate audio and video

If I'm in the wrong place I apologize. I'm using Ulead Video Studio 9 and Cool Edit Pro. I'm recording our church services on MiniDV and separate audio on a MD recorder from the mixer. I can sync up SB audio with the video perfectly starting out, but from what I understand there is a very small difference in teh timing of 2 different sources. For this reason the audio that was syned up perfect at the start of an hour long video starts to drift off a small bit later on. Using Cool Edit (which is Adobe Audition now), how can I find out the timing difference between the 2 sources and stretch it out just a hair to make them match all the way through?