It looks for a process 'cnc3game.dat' running. If you run the game and open your task manager (click on details tab) you should see this process.
Ok, it's kinda sounding like I need to run the game first not the trainer? I'll mess around with it more tonight and see what happens. Either way, I really appreciate the responses.
Honestly though, I really don't expect you guys to put any further effort into this. I'm 100% certain you have WAY more important things on your to-do list. And if I can't cheat my way through CnC 3 the world won't end.
Thanks for all the hard work, it's appreciated.
Does this work for the origins version?
Yes it does. Currently playing it on Windows 10 and Origin.