Hi R22Driver,
have a look at
http://www.pocketfms.com
Buy a regular PDA, something like this from acer
http://cgi.ebay.de/Acer-N35-PDA-GPS-...QQcmdZViewItem or from the
HP iPAQ series.
Either with inbuild GPS, if that is o.k. with your type of aircraft - or with a bluetooth GPS-mouse (dont use cable-versions, they are a pain in the a..)
Then you have your roadnavigation system - and with pocketfms on it, also a great aircraftnavigation system.
Think about the 50€ to become a donor for pocketfms, giving you better maps and a faster upadteservice.
But the free version works also very well.
You can record tracks, extract them, visualize them in googleearth and and and...
Just have a look
Greetings
"Flying Bull"