Yup... I dl'd the SC-55 version of the allstairs track (in MP3) format (http://www.queststudios.com/quest/midi/midicompare.html
), and also in Midi format, so I've been playing the midi as a tester to see if the SCB-55 works.
The PCI card can support Microsoft GS synth, but of course, that sounds completely different than the SCB-55.
I select something like "ICE External Midi"
1) W/ the SCB-55 off the PCI card and ICE selected, I get no music
2) W/ the SCB-55 ON
the PCI card and ICE selected, I get music that sounds like the SC-55 mp3 (when playing the .mid of course)