Railworks America

I have started a new route using the "Default" selection on the menu. Most of the assets are available except ground textures such as gravel, grass and others are very very limited. For instance I have only four choices for gravel under these assets. none of witch comes close to the roadbed gravel for the SR Mainline track which I am using. On other routes there are many choices. Can I import assets from another route (my own) to this new one? If so how? On other routes I have selected the Toripony model. Can I change from the "Default" model to the Tori model?

Just into the world editor go over to the asset box on the route and check off the route or author you wish to use. They will then appear in choices for you. Make certain to save the changes you made.

I went to the asset box (The small Blue Box with a little Yellow Box inside), and checked off all authors and assets I wanted to use. I did that before I posted this question. Nothing changed. Also, when I started this new route I filled in the blanks on Latitude and Longitude and I chose DEFAULT for a route I wanted to follow. On further review, since laying track, I discovered that the latitude and longitude are both at zero. I think I should probably start over.
Thanks for your help. What do you think?