What is a cdp file and how do I open a cdp file?
The CDP file extension is used by Trainz Simulator railroad simulation games. The file contains game add-on content, such as train routes, locomotive designs and scenery. It can be imported using the Content Dispatcher and Content Manager Plus tools within Trainz Simulator products, and installed in the WorldDispatcherDownloads folder of Trainz installations. CDP files are developed by third-party content providers, such as Auran, and are not part of the original game content. Several tools exist for managing CDP packages.
Relevant cdp file links:How to open cdp file on Youtube
How to open cdp file on Wikipedia
How to open cdp file on Microsoft.com