Disklavier

I am sure most of you know the answer to the question I am about to 
ask.  Part of my problem is I am not a computer whiz-however, I can 
get around but am far from an expert.

First of all I have a Piano Disc 128 Plus Silent Drive System 
installed in a late 1800's.
My question is how do I convert Midi 1 to Midi O, which is the only 
Midi the Piano Disc system plays.  I have downloaded some of piano 
music on the member site but have been unable to play much of it on 
my piano.

I have already downloaded the utility suggested to convert the Midi 1 
to O, but can't open it.

I would appreciate any simple instructions you might provide.

Thanks for you help.

Gary Gerstner