These can be imported with the program Content Manager Plus once downloaded via File>Import CDP, then select the CDP file you downloaded. Design and Build your own railroads with Trainz Surveyor and access hundreds of thousands of assets from the Trainz Download Station Share your enthusiasm with other rail fans as your combine your efforts to operate a working rail line in the new Trainz Multiplayer. Si3D's 2012 Era Thomas the Tank Engine - created by Skarloey123/ 5.5. This is the file format where Trainz Content is stored. There is a file for Trainz known as a CDP file. Any offers of assistance would be most gratefully received. So I have found where the downloads are, but I don't really know what I'm doing. I've been searching the forums to try and find out how to do what I need to do, and have been directed to Sodor Island 3D However, I can't search the forum until I get approved (pending) and my son is keen for me to start downloading now. Ideally, I'd happily pay some money, and have a hassle free experience - but I don't think this is going to happen. Hi everyone, It's me again, looking for advice before I mess up (again)! My son is really wanting to have Thomas & Friends trains and the Island of Sodor to drive around.