Also, the RM1x is known to work and thus the CS1x, CS2x and CS6x and CS6r should, too. This guide applies only to Windows 2000/XP and Yamaha synthesizers and keyboards that have a built-in 'To host' (Yamaha-lingo) USB MIDI interface and a GM or XG soundset, so it should work at least with the MO6/MO8, Motif Classic and Motif ES and the rack versions.(Anyone want to try it with MM6 and Motif XS?) This should also work with a number of PSR-series of keyboards as well but the GM initialisation procedure is probably going to be very different and I don't own a PSR so don't ask me how to do it. This guide is written using the Yamaha MO6 synthesizer and thus the procedure should be identical for the MO8 and Motif ES at least. If you have a synthesizer or keyboard sitting idly by and it has a General MIDI soundset, you might want to try using that instead of the MIDI synth that comes with Windows.