Do not try to use standard archive tools like WinRAR, 7-Zip, or PeaZip on a .cdp file. It will fail because CDP is not a ZIP archive; it is a proprietary N3V format with a unique header.

Shipped directly with older versions of Trainz (like Trainz 12 ), TrainzUtil.exe is a powerful command-line interface tool located in the game's bin folder.

Use the File > Backup Database feature in Content Manager to protect your custom content library. Conclusion

Highlight the assets you want to pull out. Click the or Unpack button. A dialog box will ask where to save the files; select the folder you created in Step 3. Step 5: Edit or Repack

Avoid manually tampering with the editing or packages folders in your Trainz directory. Let Content Manager do the work.

This only works for assets already installed into your Trainz database. It does not help with a standalone .cdp file sitting on your hard drive.

Look for .texture files. You may need an additional tool like PEVsoft Images2TGA to convert Trainz texture files into editable standard image formats like .tga or .png . Edit them in Photoshop or GIMP, then save them back.

: It can list KUIDs, search for specific assets, and export listings as CSV files.