I have an etrex Vista HCx. I have downloaded Garmin Pacific Bluechart v10.5 2008.5 and Garmin Aus Topo v3. I would like to combine the charts of the East coast of Australia with as much of Eastern Australia topo as can fit (most importantly Queensland remaining states not so important) onto a 4Gb Micro SD card.
Is there a way to combine the charts and topo maps onto one SD card that will work in the etrex. If so can someone refer me to a tutorial (I've looked but can't seem to find one) or explain the process please. I have loaded the topo maps into Mapsource so that I can view which maps I need, but I can't load the charts to see which of them I need.