BobDoleOwndU

I know. They're just zip files with a different extension lol.

They're just zip files. 7-Zip, WinRAR or anything of that sort can open them.

Check these: Texture Modding Tutorial for Metal Gear Solid V Texture Modding Tutorial [AutoPftxsTool and Snakebite 0.9.0]

I've not seen the offline GMP cap listed in the game's Lua scripts; so I believe it is probably hardcoded in the exe. There is a chance I've missed it; but I've never heard any other modders mention the cap being in the scripts either.

That cutscene uses the normal parasite suit model if you're wearing it. It's just hiding the mask model and attaching the hospital head to the body, which is achievable via the methods I mentioned previously. The data for that side-op is in chunk2.dat\Assets\tpp\pack\mission2\quest\afgh\tent\tent_q99040.fpk (and tent_q99040.fpkd); however, it also uses some assets from chunk2.dat\Assets\tpp\pack\mission2\free\f30010\f30011.fpk. From what I can tell, there aren't any assets in there that will be helpful in this process. The mask hiding/head attaching was likely handled directly by the cutscene fsm, which is not easy to extract data from.

A number of people have shown interest in making this exact mod; but no one ever has which is surprising considering that it would be relatively simple to do. But yes. It is possible to make such a mod. FMSv2 or a custom fv2 would probably be the best way to go about it.

This might be what you're looking for. Though I'm not sure if it affects Snake's fatigues. It does affect the female fatigues though.

There's a guide here. There's also a tool here; but I've not used it. So I'm not sure how it works.

The sound files aren't an issue. The problem is adding in a mechanic that triggers the horn when a button is pressed. Something like that requires editing code that's been compiled into the executable, which is not something that's easily achievable. Existing sound mods work by replacing existing sounds with preexisting triggers. As of now, there's no way to add a completely new trigger.

Probably not gonna happen. Even something as seemingly simple as making a horn sound when driving a vehicle likely would require the executable to be edited, which is unfeasible.

It should be possible in some form. It might require a custom/edited model though. I haven't explored how the heli models are set up myself.

I believe Infinite Heaven can do this. I'm not 100% sure what the setting name is; but if you look at the settings guide, you should be able to find it.

Sounds like you installed SnakeBite somewhere that requires admin access. Try running it as administrator and see if the same thing happens.

The update didn't move anything. Make sure your dictionary is up to date (latest one is here). The armour Skull's model is in chunk4.dat\Assets\tpp\pack\mission2\story\s10140\s10140_area.fpk\Assets\tpp\chara\wmu\Scenes

It'd just be a texture swap. (It could also technically be done by swapping texture names in her model directly, which is easier if you know how to do it; but harder if you don't.) So yes. It's completely possible, and not really that hard of a mod to make. There are texture modding tutorials here and here. (In this case, you just need to swap her original face texture with the one with markings though. Not create a completely new one or modify an existing one.) And a tool for swapping texture names inside of models here.