I just got my Montana last week, and I'm having serious issues with BaseCamp, and more specifically, loading Topo U.S. 24K Southwest. The first day I got everything, I connected the Montana, downloaded BaseCamp, and installed CNNA. After that, I installed the Topo, and from what I recall ( I've installed, uninstalled, etc so may times I forgot if it ever installed 100%) it showed up on BaseCamp. The same day or next, I began getting an error ever time I try to load BaseCamp. It says there is a error in the Windows Registry. Now, I can sucessfully install BaseCamp or the Topo 24K by themselves and they'll install fine. It's as soon as I attempt to install the other is where I have the problems. Another weird thing I noticed today is when I use Mapinstall, it shows that the Topo 24K is there: And then if I click on advanced/partial install, I get this: I called Garmin today,dealt with the software dept. I even had the guy remote access my PC. He says that there is issues with my registry, and maybe so. I think that there is something wrong with the Topo DVD got. It seems like everything else works properly. Basecamp, my old copy of Topo U.S. 2008, etc. As soon and the new Topo 24K Southwest is introduced, things got crazy. I'm at my witts end. I want to learn how to use this GPS the software and I'm just not able to. Any help would be GREATLY appreciated!