I know the frustration on mapping and GPS.
What are you trying to do is the big question.
I've been slacking on my mapping stuff, but what I found to be the best for me is using the US Topo's, which I've loaded onto a USB drive with the whole state.
I connect to it from my laptop and then down load the Track Log or Way Points from my GPS and overlay it.
An easy way is to download your GPS log(s) (tracks or way points) as a GPX or Text file and go to
http://www.gpsvisualizer.com/ and convert the file into whatever format you want or have it overlayed onto a map you can print out.
I have some info on the Map page at
http://www.snowtravelers.org/gps.php which may help.
I know I need to get my mapping stuff back together and current and then meet with Chuck Johnson and go over it and how to accomplish what we want to do, my main focus is getting more trails on line under the map section.
There are a number of options these days, OziExplorer and GPSBable to name a few.
Hope this helps
PS Edit, one of things i really like about gpsvisualizer is you can convert your log files in Google Earth and what they call the Multi Option Viewer so you can change the maps overlay from Topo to Hybred, to Street view and others.