The guest is right, Picard's Betaplayer (
http://betaplayer.corecodec.org/) is the best video player, a lot better than PMVP and has support for B frames.
Betaplayer works perfectly with Pocket Divx Encoder (
http://divx.ppccool.com), which I think is an excellent encoding program, a lot simpler than Vdub, faster and just as good!