[JasonACT]

Yes and no, this is a u-blox neo-6m unit, the real sat-nav FDIMs are u-blox lea-6r but the only difference I could see is the lea-6 is a lower power unit. The iGo software understands heaps of formats, apparently, from looking at the exe. But yes, these devices use a simple 2 wire serial port. I could write a new "gps" program to use a different device (the current one configures u-blox ones only) but these are dirt cheap and readily available - so not worth the effort in my mind.

The trick in getting something else (open source) working on these units is the navi_2_hmi_connector program, as that's the thing that allows the navi software to take over the screen and get touch points back... I have no idea how it works, so it would be difficult to make other software work with it.

That's the main reason my gauges are using a part of the screen (the two bottom corners) that isn't used by anything else. That, and every QNX program I write ends up with me re-creating more and more of the QNX library - I doubt the QNX graphics lib I've already got working would be compatible in any way with open source nav software. So lots of work.