Elizabeth,
I have all of John Roache Piano Rags that I could find in midi on floppies. They load into my 7000 with no problem. The 7000 need not be connected to a computer.
If you do not have Alec Pagida's books on the 6500 and 7000, you should get them from Walt Tenay. They would answer a lot of your questions and assist with the keyboard/computer connections.
Fran a man in Florida