I'm not sure what this forum's policy is on spoilers, but I've encountered a problem near the end game and I'm not certain if this is a bug or if I'm just not smart enough to figure it out. Asking outright would obviously spoil the endgame for new players, so I'd like to ask... is there any walkthrough or hint guide available?

Failing that, would posting spoiler tags in the topic make it okay to ask a specific question about an in-game puzzle?

Ah, okay.

Actually, no, I put the game aside after running into a wall and never got back into it. I'd very much like to finish it, but let me go ahead and ask my question.

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SPOILER I GUESS
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In the end game, I'm at the part where the three characters need to work together to unlock the door at the top of the tower. I used the grenade to blow the power, letting me knock out the guy with the gun. Then I gave control of the tower to the people outside, overriding the AI. I figured out I need Latha to go in and hold the door open in the Trance, while getting another character to shut off the power, but I think there's a third thing I need to do in the time window before power resets, and I can't for the life of me figure it out.

Put simply, what sequence of actions do I need to do to override the locked door at the top of the tower? I've tried every combination I can think of, and I'm probably missing something obvious, but I don't think I'm going to figure it out on my own.

EDIT: Oh, and I put up the antenna of course. I think that's a prerequisite to getting the people to override the AI, but that's already done.