Basecamp. Change multiple 'Symbol and Name' - GPS technology and devices - Geocaching Forums
GPSrChive BaseCamp - Custom Waypoint Symbols
Custom waypoint symbols Ver. 2.2 for Garmin Alpha 100 (Atemos, Astro and I suppose all other Garmin GPS'es with a colour screen) and BaseCamp - Basecamp Windows - Mac/Windows Software - Garmin Forums