I recently bought a Nomad 800L in very good condition. I'm trying to load a version of Survey Pro suitable for this machine. every link I've located on the Trimble website returns a 404 type response. I need to stakeout a fence line with a perimeter of 2.1 Kilometers. The GPS works fine. I f I cant get Survey Pro are there any other mapping programs that i can load? Assistance would be appreciated.