To install any Thomas-related .cdp files, you must use the Content Manager to drag and drop assets and check for missing items.

Do you have experience on your device? Share public link

The official Download Station is your primary gateway. Many creators upload un-branded or look-alike locomotives that mirror the Sodor fleet.

"Don't be a Troublesome Truck—get shunting in Trainz Simulator 3 today."

For fans of the Thomas and Friends series, Trainz Simulator 3 Thomas is a dream come true. The game offers a chance to relive fond memories of watching the show, while experiencing the thrill of driving Thomas and his friends through the world of Sodor. The game's lighthearted and family-friendly atmosphere makes it an excellent choice for players of all ages.

Since Thomas is a licensed property, you won’t find him in the base game's "Stock" list. To get started, you’ll want to look into Downloadable Content (DLC) Content Manager The Download Station (DLS):

No route is complete without chaos. Add "Troublesome Truck" rolling stock. In TS3, you can set their "breakaway" physics so that if you take a corner too fast, they uncouple and derail—exactly as Sir Topham Hatt would punish.