kjzone
I am not sure that I follow your statemnet about "Your Windows computer comes with a Midi Player, but you only have about 6 midi Instrumental Sounds available" any adequate MIDI software that has General Midi (GM) will have 128 instruments plus a few dozen percussion instruments usually in channel 10.
For several years I did my CDG with MIDI using Digital Orchestrator Pro. It works great, unfortunately Voyetra (the makers of DOP) have not upgraded DOP to work well with XP. So I went and invested in Cakewalk Home Studio. Since I also have a MIDI keyboard in my sound card, I can play around with some of my own stuff (minor). Cakewalk does come with a Roland Sound cavas, as did DOP. It does make the sounds much richer, no doubt!
A lot of the "crappy" MIDIs that one gets is also due to the person that made them. In making MIDIs it alwas helps to "enrich" the notes that you are playing with some of the enhancements in the softwares (echo, arperggiator, reverb, distortion, humanization, and many others) If one uses straight MIDI notes without the pluses, they sound stiff. The sound canvases repair many of these conditions. They work great and Roland makes some good ones. A word of caution, in some older computers the timing of the sound is affected when the canvases are used.
In another subject
www.musicrobot.com is another MIDI search engine.
Thanks for the links in your e-mail.
BANDL