That is what I use. I bought a toughbook from e-bay and a earthmate GPS and the program. It all cost me about $350-$400. It works great. I have had Version 2 and 3. The nice thing about Version 5 is it lets you create roads on it. There are so many roads we wheel on that are not on the maps that it is nice to be able to put them on. My only complaints, which are really no big deal, are the 3-D rendering doesn't do to well on my laptop (works fine on me desktop). I think this is because my laptop is a P233 so it is not fast enough. Also if you get out into a lot of the West Desert of Utah it shows a lot of roads the don't really exist anymore. I mean they were roads at one time, you can see where the sagebrush dips down for about 8 ft so there must have been a road there but not anymore, I wish there was a way to delete them off of the map. For now I just put an X at both sides. Let me know if you have any specific questions.
Medsker