I'm getting closer! I've implemented the procedure above and can now display my custom waypoint symbols on Mapsource 6.5. I've also loaded them to the Legend C thru ximage. They show in both the Mapsource and Legend C waypoint symbol tables. My problem now is in the transfer. Custom symbols will transfer from the Legend C to Mapsource but not from Mapsource to the Legend C. What I get is a default symbol (small marker square) that I get when I try to transfer a standard symbol from Mapsource that is not in the Legend C table (like letters and numbers). Any help would be appreciated - thanks