I have filled up my GArmin eTrex Vista with all of the waypoints it can handle. I've also bought a MicroSD card from Walmart, but I can't seem to figure out how to put more waypoints/POI onto the MicroSD card. I have tried using POILoader and made two files, one that is .gpi using POILoader and a .gpx file using GSAK, and put them on the MicroSD card. However, I cannot see any of the information when I put it in my GPSr and turn it on. Any thoughts?