Hi,
I have recently purchased a 76csx for a jet ski. I have a 60csx for geocahing. I was able to install topo/bluchart and citynav onto th 60csx. When I try to do it with the 76csx one always get over written. I seem to recall that there was a specific order for loading them but I cant remember. I have a 4 gig card and am familiar with how to turn them off and on in map setup. Any help would be great.