MidianD

I think troubleshooting an issue like this requires a preface: Removing mods doesn't always remove all the data that a mod may have added. In other words, removing a mod and reloading a save also doesn't always "clean" the save file like one would think. There's a chance that whatever mod caused the issue will leave some dirty data in your save files created since you added the mod in question. Before starting make a copy of your save game directory and put it somewhere then start. With that said, I would go to an old save, remove each mod one by one and test each change by teleporting to the red button and see if it works. If it suddenly does, you found your problem. Remove that mod and hope it didn't leave some stuff behind that bites you later. Usually this will work. Make sure you test the removal of each mod on the same old save file, not a different one. This keeps the variables to a minimum and should help you find the culprit. If you find it the mod causing the issue, go back a few saves from your most current, remove the mod and load the game back up. Things hopefully will be good after that. In the future, Keep a different character save file around to test new mods or download a save off nexus to test mods out on.

I meant a script that joined Vanilla with London so you could play both in the same save game.

For the train, turn your quality to low and get through it, or press the "skip" button right when it starts to bypass it.

MO2 is great. It has the option to keep .in and save files separate per instance. I just started using it, and it took a while to learn, but I'm glad I did.

It sure would be nice if they packaged it with a way to run both games right out of the box... Or someone with enough knowledge could write a script that moved everything to the right place for MO2