Irondale wrote:Claudio Mussa, who is a member here, has a program from his site called "RW Merge Route".
Almost to the bottom of his front page you will see the link.
http://www.mcs-software.it/rs/index.htmIts free to try, he is just asking for a donation.

His method still requires that both routes have the same starting point.
To explain why the route's can't be merged. Each route has a starting point when the author first sets it up. All of the tiles in the route are based on this lat/long with the tile +000000+000000.bin having this lat/long as its bottom left hand corner.
All other tiles are offset from this point, and all scenery items/tracks etc within a tile are offsets from the bottom left of each tile. Unlike MSTS, nothing is placed using the actual lat/long of the object.
Therefore the 2 routes you are trying to merge have completely different offsets within the tiles, and while it might be theoretically possible to calculate the changes in offsets required to merge the 2 routes, the fact that the earth is not flat and that the lines of longitude are not parallel makes it a virtually impossible task.
Mike