I just read your questions again and felt I might be able to explain one part more directly. To acess programs numbered above 126, you will need to remap them using the information I gave before. For an example;
You may want to use program 188, and you want it to be located at 000. You simply change the value of the second set of numbers,
000 > 188
Program 188 (tom toms) will be at location 000, where stereo piano used to be. If I haven't made this clear, e-mail me as I am not very good at explaining things.