Still have not found a way to fix the AC4400CW CP, the patch that SS supplied is not working, along with any other mods, if anyone can find a way, that would be awesome!
I do not understand why it is not for you. Are you applying the correct patch, Steam or retail? Are you running in 64 bit? Are you applying it correctly? Everyone I know has a working unit. Instructions are simple, take the downloaded file and open with 7zip or other file decompression software, take the 3 files, Manuals, Content, And Assets and drop them in your Railworks folder and allow overwrite.
The steam patch only has assets, I am indeed running the game in 64, but I will indeed retry the patch download.
The OP did download from SS but claims it doesn't work. Confirmed the Steam patch only has an Assets folder. One other observation, if you were mucking around in the AC4400 file to get it to work prior to installing the patch and somehow corrupted the file, you may need to uninstall and reinstall the product, then apply the patch. Untick the AC 4400 in your manage my DLC in your Steam profile, reboot your computer then go back to manage my DLC and retick to install then apply the patch. If you have already done this use this method, go to the AC4400 folder within Searchlight Simulations and manually delete the folder before doing the untick and retick process. It sounds a little convoluted but doing it this way will ensure that you are getting a fresh copy. You said other mods are not working, can you explain?
It maybe that he is dropping the Assets file of the patch into the "Assets folder" instead of into the Railworks folder. If that is so it will never work.
That's why I sent him a picture, it's worth a thousand words. As mindenjohn said drag this in your Railworks folder not your Assets folder.