Some Trainz 1.3 routes are on the DLS. I once downloaded a route from Trainz 1.3 into TS2010 (build 49933) which was based on a model railway trackplan by Hornby, but it unfortunately crashed the game. This is probably due to the fact that route file types have changed over time.
I do not know if this was an unfortunate circumstance which is only present on this particular route for whatever reason or something that affects all Trainz 1.3 routes.
Kieran.