I'm sure, that if you follow the link in his signature, you'll find the download too. (Require registration).
And all you need is to download the 255 MB file and install it with RW's Package manager.
In the readme, there are listed some rollingstock which has to be installed, if you wanna drive the freeroam scenarios, that follow with the route. You dont need them for your own scenarios. Sometimes they will show up, first time you start your own scenario. But only once (a RW fault)
Then enjoy the largest route for RW to date
Bab