OpenStreetMap

ditari i h4ck3rm1k3

U postu prej h4ck3rm1k3 më 19 August 2009 n'English Last updated on 22 September 2009.

merge many osm filesinto one.
concat them and then merge.
this will also give the ids new ids.

If you want to merge/extract or other mess with OSM files you can also use Osmosis...
osm.wiki/Osmosis

Thanks, I will look at that. I know osmosis is powerful.