Hello Mike,
did you look up the mailing list's archive for tabulature?
You find it at http://www.gmd.de/Mail/mutex-archive/
Did you see that there is something about tabulature on
http://www.gmd.de/Misc/Music/ under MusiXTeX add-ons?
MuTeX was the first package for typesetting music with TeX
and it's completely out-of-date. MusiXTeX is the successor
of MusicTeX. So the right choice is MusiXTeX and maybe
PMX as preprocessor.
There is a little bit about tabulature in MusiXTeX's
documentation. IIRC it's not much.
Six lined staff is easy: \setlines16 It adds one line on
top of the five lined staff. The rest isn't as easy.
-- Werner