Disklavier

William,

Before the files, try checking the Disklavier user manuals, and make sure
that you have experimented with the options for reading the piano part from
different tracks in the file.  I find that I am able to play many midi files
without editing, just by taking advantage of the built in options on my
Disklavier.  

If your midi file really needs some editing, there are many packages
available for this purpose.  Here is a web page which describes all sorts of
MIDI related software.  There is a huge range in price, and many of these
programs will do much more than you need, so shop carefully.

Meta