Disklavier

Dear group,

I hope this is a good place to ask this. I'm new here and the reason I 
subscribed is the following:

My (very non-technical) sister has a Yamaha Disklavier upright. She 
asked me (the one with the home studio) if she could play other files 
than just the one's on the floppie disks from Yamaha. So I explained 
midi files a bit.

Ok, so now I've got to get her a USB<>Midi interface for her laptop 
running WinXP. Probably something simple like the M-audio midisport 
uno, or the ESI romi/o. They are both in the 45 euro range. If you have 
any recommendations, I'd appreciate them.

I also need a simple midi file player, something with a playlist, and 
some sort of capability to mute instruments (drums probably don't sound 
to good on the Disklavier). It shouldn't be too technical or 
complicated. A sequencer program, even an entry-level, is probably way 
overkill. Most standard media players that can handle midi files, don't 
allow you to mute various channels. I am not really at home on Windows 
in this regard, so I could really use some input here.

I browsed the archive a bit, and found a reference to 
vanBasco's Karaoke Player. Is that indeed a good solution for my 
sister? Are there any other (free or cheap) alternatives I could look 
at?

Thanks very much,
Ben