Alright, so this is what I've tried...
gamelauncher > "start game" (in grey box) > bring up winject > inject CRC bypass > inject trainer (nothing pops up) > exit winject
Per Bartjr's advice, I tried injecting another .dll between the bypass and trainer to fix this...
gamelauncher > "start game" (in grey box) > bring up winject > inject CRC bypass > inject canvas.dll (in MS folder and I get no visible error with this) > inject trainer
The trainer still does not pop up. I run winject as administrator, fyi, not sure if that matters. I appreciate the help from everyone thus far and look forward to your suggestions.
-edit- I exit winject after all injections and then press "start game." I do not receive any "hacking tool detected"-like error; MS starts up fine.