I'm currently wrestling with a really strange CTD that I can't seem to get around. It started when I exited the Washington Monument after attaching the Virgo dish and all that jazz. Upon exiting the monument, the game crashes. So I reload and teleported to GNR and everything went fine. I fast-travel back to the monument and it crashes. I reload, repeat the steps, fast travel to somewhere nearby, and run to the monument. When I get a certain distance away, it crashes. I assume it's because it's loading something in that cell that's crashing the game.

On a hunch, I start warping my companions (that are still at the monument) to me. I get to Charon and the game crashes. So I think, "hey that's weird" and reload and try "resetting" him according to the instructions at http://fallout.wikia.com/wiki/Fallout_3_console_commands. When I attempt to disable Charon, the game crashes. I can kill/resurrect him, OpenTeammateContainer him and interact with his inventory, but cannot disable him. I attempt to wait 24 hours and see what the game does with him, and the game crashes. Also if I fast travel somewhere that takes a decent amount of time, it crashes. I assume this is because the game it trying to warp him to the Ninth Circle and crashing.

Any ideas on how I can fix this?