I am using a combination of the sunset valley and twinbrook distant terrains. The Twinbrook one in particular is merging well with the edges of my world.
soccergirl1996 - The train tracks were unlocked using GiLaNg's mods over at modthesims.info:
http://www.modthesims.info/download.php?t=418719.
Currently, my CAW does not open up edit-in-game (due to the latest patch). It's a problem which seems to be affecting anyone who updated but did not buy Generations. Nevertheless, I've been installing it to the game itself and building and saving lots that way.
