I happen to be one of the beta testers for Topofusion and a few days ago, I had requested from Scott Morris, the brain behind Topofusion to check out is kmz file export would be possible in Topofusion (TF). I got my answer yesterday night with a new beta version ot TF Pro that can do exactly that. Topofusion offers you WYSIWYG, what you see is what you get on your Oregon/Colorado/Dakota.
Anything on TF's screen can be sent to the Oregon, topo map, aerial, color aerial etc. Even custom maps, and TF really shines here as the georeferencing is simpler and much faster than Google Earth and if you downloaded the mapping tiles ahead of time, you don't even need internet access to georeference a user map.
What more, I made these maps using a 6-megapixel picture taken with a camera I use for SAR. When on a search, I hate having to play with cameras settings or with jpg file that need to be shrinked etc. It is all easy to do but these are details that distract me from my main task. Once the user map is georeferenced in TF, the screen display is 1274 pixels wide by 853 in height sending out a kmz files of 106-140KB.
Also, I enlarge the screen display on TF and made three kmz files, the UTM grid helped tremendously in making sure I don't have huge overlapping areas or worse, holes in my coverage.
Once on my Oregon, the three files are there on screen, and I can scroll seamlessly from one area to the other.
Thank you Scott, for coming up with so far the best and easiest way of sending maps to the Oregon!