how to deal with dean in the Tampico theatre ?

I tried all dialogue options and he just turned against me no matter what, even though i was positive with him through the whole game. I guess you have to play along with his plans instead of using the Collar or Explosives dialogue in the first conversation you have with him. THat's all i can think of.

That's right. You have to be good to him throughout the DLC in order to keep him alive. Don't hurt his ego.

Is there a console command to give him the dialogue for the peaceful ending, or a way to change the ego points value? I know there was something similar for Boone's quest, so there might be a way in this situation.

Ah well, he was a bit of an **** anyways.