Hi guys. I put up my free tool, midimml, in case anyone's interested. It converts regular ol' MIDI files (with some annotations) into MML, so that you can use just about any graphical MIDI editor instead of typing notes into a text file.

These of course can be converted into NSF with the mck tools.

The site is: http://tom7.org/midimml/

I hope someone finds it useful!

- Tom 7