I just took a look at the above map links.

probki is not google map compatible system, totally different.

Interesting thing is that eniro indeed uses the same google map numbering system to name its tiles, but its whole map tiles are arranged around Stockholm, including service for other countries!

So the central tile with Stockholm at its center is always (0, 0), toward east x goes 1, 2..., west -1, -2, etc.

It's possible to rip its tiles and translate them into google numbering system. But its map tiles is not 1 for 1 match with google tiles. There is a goe position shift for every tile, because google doesn't put Stockholm at the center of the tile. So the software has to be changed to incooperate that offset, or you force the mapper to a particular location with the new lat, lon values, it has that capability.

eniro map tile
http://img516.imageshack.us/img516/1113/enrodn2.gif


google map tile

http://img516.imageshack.us/img516/3351/googleea5.png