It is incredibly inaccurate with nuclear missiles, the explosion happens very far from the point marked with the remote control. Why?!

I guess you are using explosives as payload. They are used to increase spread. Without them it will work a lot better. Just use a nuke or grenades or something. For more Info about payloads please read the FAQ.

Okay, you said that if I want accuracy, I have to sacrifice blast radius. A similar thing happens if I try to launch more than one nuclear missile. Well... I'll try, but it's pointless. There's no way to increase destruction without sacrificing accuracy. All the effort, time, and resources invested in ballistics render it useless. It's more useful to launch the missile manually from the player. But thanks for trying, this mod has potential.

Nope, I think you still misunderstand how the payload system works.
Explosives (the item, not any "explosives ammo") increase the spread of other payload items - not explosion radius.

Here some examples:
1 Nuke + 100 Explosives = One inaccurate explosion
10 Nukes + 100 Explosives = 10 explosions scattered around a large area
10 Nukes without explosives = 10 explosions very close to the targeted center

The script "unpacks" ammo items and uses them as if they were fired from a weapon. Explosives are no ammo item and are just used as some kind of modifier. If you want higher accuracy use lubricant barrels, they decrease the spread even further.

Ooh... I misunderstood, thanks a lot. I get it now. Anyway, the payload examples explicitly state that explosives increase the "Explosion range", not the spread of other items of the payload. I guess you should correct the documentation to avoid future confusion.