I live in Nairobi, Kenya, and have a MIO C220 GPS device. After much trying, I can now nicely download tracks, and upload them in to OSM, and the OSM of Nairobi area is now looking good.

But - does anybody know how I can UPLOAD some map tiles from OSM in to my MICO C220. I have spent hours googling trying to find some clues, but no luck so far.