Righto, a few suggestions to start...
- Take your time and be patient
- If you don't completely understand what people are suggesting, don't do what you think they mean - ask first or you'll just get frustrated.
OK.
1 - Start up CMP
2 - Decide on a logical group of assets - search for all BR assets or all by "Tafweb" or all buildings or all layouts or whatever...and use the filters to ensure you're only getting the local & non-built-in ones.
3 - As you select them, drop them into the "Archiver" box on the left of the CMP screen. Remember, keep to your decided upon block of assets, don't overdo it.
4 - Once you have a good bunch of assets, hit the "archive" icon. Once it goes through the list, it'll ask you if you want to automatically add the dependencies - say "Yes" then select an appropriate name for the file - use the company/creator/category so you don't forget which is which.
5 - Continue this until you've got all the essentials. I had about 20-25 separate archive files.
6 - Kill off Trainz and all your local files - if you want, you can keep a copy of the local files somewhere else (an external drive or the like) but remember that somewhere in that local assets folder is whatever it is that's causing the problem.
7 - Load a completely fresh version of Trainz, patch it and make sure it's running OK - check the products all work OK.
8 - Start up CMP and Windows Explorer. Locate the archive files in Explorer and drag and drop them one at a time into the Archiver box in CMP and let CMP load them up for you. Remember, only one at a time and check Trainz for product function after each one. If it works, all good. If it fails after you loaded a particular archive, make a note of which one archive it was (and don't load that one again!) and repeat this from point 6 onward until it works.
It may not be pretty but this is how I got up and running again...
Good Luck!
Cheers,
Dreadnought1