I run a gns8350 with igo8. Huge improvement. The GNS8350 is just a wince 4.2 device that will run a PNA version of igo.
start here You will need a different wince explorer as the one they recommend didn't work for me.
Install igo8 on a blank SD card
I had previously posted instructions on how to set this up on this site but it appears to have been deleted.