For anyone looking in to setting up a GPS system for a trip for the first time, and wading through the treacle of understanding - this may be of use -
Garmin Mobile PC - basicaly gives you the same functionality of a Nuvi/Zumo etc but on your laptop or touchscreen car PC.
After doing weeks of research on what type of GPS system to set up for our impending UK-Capetown trip, which took my GPS knowledge level from zero to , er, about 1, I finally opted for the Garmin software version as we have built a PC into the dash with a touchscreen. I looked at Fugawi and a couple of others which have a good name, downloaded demos, but they seemed overly complicated for me, all I want to know is where I am, which way to point and if there's anything I'm about to drive into that will either be nice or nasty.
Maplins are selling the garmin Mobile PC software, plus a GPS mouse for £59.99
delivered! (only when ordered on-line) - most other places are charging considerably more than this, and a USB mouse on it's own costs nearly this much. There is a cheaper option without GPS mouse, but do some reading before you opt for this, as there is a difference in the software and it stops being compatible with some other mapping.
Load the CD, plug in the USB GPS mouse and tadaaaa! full touchscreen satnav
with full European mapping and speed camera info.
beyond the European road mapping, there seems to be enough main road mapping through Africa for it to be useful on it's own, but we have opted for Tracks4Africa, which you then simply load into the Garmin Mobile PC software (via Mapsource) and voila - routable African mapping and info that seems to work spotlessly.
With T4A mapping for most East African countries coming in at about £80, it makes it a very cost effective system if you have a PC and touchscreen, with virtually no GPS 'knowledge' needed to make it all work.