Using CMP, right click the desired traincar and select 'save to CDP' and save to a temp folder. Repeat for all the traincars you intend to copy to TRS2004. Then open explorer and find ..\Auran\TRS2004\Bin\TrainzHelper.exe, double click it, verify the correct path to TRS2004, and click save. Now go to the temp folder and double click each CDP file to install into TRS2004. Finally, delete the ..\Auran\TRS2004\Cache\World_cache_dispatcher.chump file. If any problems show up run TO to solve.
Bob