You can convert them to a video,
1.render the seq to a stereo wav
2. drag the wav into a track
3. save to an sgu selecting the stereo mixdown track as the Audio
4. open the the sgu in Biab solo the Audio track
5. Save As > Save As Video

http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=281297