USGS Terrain Data and TS 2015

Also posted this in Route Design -- I guess I waited too long to get into route building. The USGS site has changed. Has anyone come up with an updated tutorial on how to get terrain data into TS 2015??? 

https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=55&t=13617