A bit off topic, but would Blender work for making models to use in game for Fallout 3/NV/4? I eventually would like to make the armors and weapons more accurate to the original games but know nothing about going about it.
I've been enjoying my playthrough through it, but did you modify the turret weapon range? It seems like they are hitting me from a lot farther away. I can't even get behind the boxes by the fence in Hawthorn.
Sounds like a script didn't trigger. Best bet would be to reload to a save before the speech started. I've had a lot of problems like that with Skyrim and Fallout 4 and that usually fixes it. If you're not able to do so then the quest is likely permanently broken.
I believe there are plenty of resources already posted here in NMA to get you started. I haven't been here long enough to give you exact threads to go off of but most of them are likely in the modding forum. Not to sound like an ass but the search feature would probably help a lot.