I had downloaded a trial version of some software named Muse from a net site in Europe as I recall. I was about to register it, being pretty impressed with it's capability to produce guitar tab as well as standard notation, but decided to have a look at NoteWorthy Composer first. This is another nice package but lacks the tablature feature. Now that I've decided on Muse, I've lost the address. I'm pretty sure it was here that I first learned of it, so maybe someone can point me back at the right site.