OK, I'm probably missing something pretty obvious. I have a Garman Oregon 450. Is it possible to load both City Navigator and Topo 2008? When I build my mapsets in Basecamp and transfer them to the Oregon, it bumps the other one. In other words, if I have Topo on the machine, when I load the City Navigator maps, the Topo ones go away. Going into setup-maps and trying to select which one to display, the previous one isn't there any more (my custom maps stay). I suspect I'm doing something wrong, can anyone point me in the right direction? Thanks.