XMPlay is a good player, and you can use AdPlug (for winamp, but works with XMPlay too) by putting the dll in the Plugins folder. That will give you accurate playback. Also, if you want to play it in modizer, just do a search for downtown.mod and select the one that says Protracker/Chris/downtown.mod. The reason I don't just use that one is that the instruments are all wrong.
Furthermore, note that you can come up with some pretty cool songs just by searching for downtown.