[Lazlo182]

I'm trying to find other forms of the Dirac Equation, but that also satisfy the original definition of the equation.

[lambdatronics]

Are you familiar with Hestene's work?

http://geocalc.clas.asu.edu/html/GAinQM.html

I can't make heads or tails of it myself, but it's definitely off the wall. In particular, his geometric interpretation of the unit imaginary is interesting.