As in, you're getting an end of demo screen and it continues anyway? Unless that's the case, there should be no issues.
No, I don't get an end of demo screen at all. It continues to the bad ending after entering the password.
Then my clue to you is this: Think back to the decisions you could make when you didn't have the password and go from there.
Ah, I got it. I was doing the right thing at the wrong time, which I didn't realize was possible :P Or maybe it wasn't possible on the other routes.