Cool ... I installed it, and checked it out -- just the thing I was looking to experiment with -- very helpful.
(I had previously tried also using the example of car behaviors here (which also adds strafing), and also just change a custom key in 8 direction beahior to move a certain # of pixels (results were jerky).
I do think this is a little better... well, actually both are somewhat awkward - I see what you mean by adding left and right, which should be easy to do using your example. Thanks!