Use POI Loader from Garmin.
The Help file in POI Loader is very good.Code:Please Login or Register to see the links
Copy the current.gpx file to the computer and process it using POI Loader
POI Loader will create a GPI file which must be copied to the GPI folder to the Nuvi.
You can also use POI Loader to Transfer the GPI file to the Nuvi directly.