I have a program, Dynamic Mileage, it does not use the 5 way navigator. A trial can be downloaded here: http://www.webmasteris.com/PalmOS/Mileage.htm
I set up the navigator to replicate screen taps where the navigation buttons are on the screen. It will not initialize the direction arrows. If I manually tap on
one of them with the stylus than the Navigator will keep it moving in that direction but won't go any other direction until I tap on that direction arrow with the stylus.
Here are my settings: