Topics

I was recently given an Oregon450t.  I bought a 4G micro card and want to download the colorado topo 2011 to use on it.   Do I need to download basecamp or something on my computer before downloading  the colorado map?  Can I just download the map and then send it to my micro card without even opening it?  I thought that the oregon 450t has basecamp or mapsource already on it....am I wrong?  Please help.