This video from Youtube is in German. I don't speak the language, however, her video is very self-explanatory visually.
This tutorial is to make a bag with tabs on the ends of the zipper, which makes a very nice flat zipper on the top of your bag. Sometimes it can be difficult to get the side seams sewn and not get those tabs bunched up in the seams. She shows how to do this flawlessly!

The 1st part of the video are instructions to make the patterns for the outside & lining pieces.
It's a long video, so watch when you have the time. The demo on sewing past the zipper tabs is near the end.

http://www.youtube.com/watch?v=GwFevqoejXc