I'm having a very hard time finding a GPS software package that is usable on the Flyaudio system (for 2008 Lexus IS250)

I've managed to download a bunch online, but none that support 800x480 res and contain North American maps.

I'm pretty decent with computers, but this totally has me stumped.

If anyone can steer me in the right direction with a few instructions on how to complete this, that would be greatly appreciated.

Thanks again,

Deejay