Garmin and OSM

defride Posts: 277
edited January 2014 in Road general
Quick query re OSM for the Garmin 800 I've just taken delivery of.

I've used openstreetmap creating a file for microSD for the all UK map which seems to have uploaded correctly. Will hopefully try it out in the next few days.

If I wanted to add mapping for France at a later date can I download in the same way and add it to the Garmin file on the SD card or do I need to repeat the exercise and create a single file with maps for both the UK and France?

Would appreciate any advice, thanks