Thanks for the help everyone,
I would up changing the stringTungings line to:
\set Staff.stringTunings = \stringTuning <e,, a,, d, g,>
And everything works fine. However, I also tried the notaion:
\set Staff.stringTunings = #bass-tuning
but that didn't work. I'll have to figure that out at a later time.
All-in-all, I installed mediawiki with the Score plugin to show off a few
guitar tabs I transcribed a few years ago. If you're curious, the first one
(that now works) is here:
http://wiki.beakerboy.com/index.php/Steven_Smith