CM = Content Manager = CMP (it was called Content Manager Plus on some versions)
Launch Trainz
Click "Content"
When Content Manager has launched, look in the left hand column for "Search"
Click the + there.
On the left, choose "Author"
and on the right type in "fishlipsatwork"
Click on "Apply"
On the right side you will see a list of all this assets. Most of which (if not all) are "DEM Routes" or routes made using real world "Digital Elevation Maps".