Thank you! I've changed the fallout.ini, and now head skin tones are matching the bodies. Although the guide specifically says to change it in falloutprefs.ini (which I did). And thanks to other posts, I re-checked that AAI is turned on. Somehow it was turned off. That fixed the body textures and light source flickering (at least I didn't notice any yet).
Does anyone know what might be the problem with the Laser Rifle's Iron Sight? So far, it's the only weapon that I have this problem with. Also I have random flashes from the light sources, which, I'm pretty sure, are related to Electro-City. If anyone knows how to fix them, that would be much appreciated. And another thing: how do you fix the skin tone mismatch? Some textures are missing entirely:
Missing required tags in ModuleConfig.xml (plugin types), so both MO and NMM had problems to install it correctly. Also, from the guide: OR you can simply change the extension from 7z to zip.