I used http://garmin.openstreetmap.nl/ for creating small maps for my garmin 520, as it has only ±100MB of storage for maps.
I tried other sites, but did not work for me.
BUT, if you select your country on http://garmin.openstreetmap.nl/ on the left you will see a list of all the tiles used and you can download the individual tiles. For Belgium it was 53 tiles and it took me a while to map the tiles to a screenshot of the map from http://garmin.openstreetmap.nl/
Using the mkgmap I’m able to combine the tiles I need for my next ride.
Would be nice that you could download the tile by clicking it on the map, so that I don’t need to figure out the correlation between the tile on the map and the .img file.
Or is there another way to find out this information?