These instructional videos by DJ Spek illustrate the use of the BeatMapper and Jackson. They don't replace the manual or the guidance by somebody in the know, but they can definitely put you on the right track.

The videos are screencammed flash movies. They are compressed, so don't expect pristine audio or video quality. Moreover, the screencam itself might have introduced small artifacts in the audio. Still, the needed bandwidth is about 300 to 400 bps, so you do need broadband. If you'd like to see these videos in a narrowband format, let us know.