Some pre-info: I bought the main game when it first came out and it was probably my first steam game too. Now just couple of months ago, I bought the pack from steam which included all the DLCs from Dead Money to Courier's Stash. Was an extremely reasonable sale price.
The problem started when I actually tried to enter the first DLC zone in Dead Money. I entered the BoS bunker, got knocked out and taken to hologram guy in some red-hue city. I talk to the hologram guy, everything is good so far. But as soon as I exit the conversation with him, I can play for 2 seconds and then the game always crashes to black screen.
Stuff I've tried so far, but hasn't helped:
-I heard having quest items in inventory could crash it. Only thing I had was the rebreather. I went to GECK, made it non-quest item and tried again, didn't help.
-I heard the game loads the data files in wrong order. When it should load Falloutnv.esm first, it loads DeadMoney.esm first. I downloaded fallout mod manager to change the load order, didn't help. Could also be I didn't use it properly. The order the files load in FOMM list should be from top to bottom, right?
-I use some mods, Project Nevada and Readius. Also re-textured gun skins. But these mods are of latest version and I've never heard anyone saying they could cause the game to crash. Also using NVSE.
Can anyone help?