Is there a mod which removes the silver only requirements for killing silver only creatures? (scamps, ogrims, daedroth etc) Ghosts I can forgive but I think MW overdid it with the silver only creatures.

You don't need a silver weapon. Any enchanted weapon will do, even if out of charge.

I don't use enchanted weapons nor do I wish to.

I believe which type of weapons an enemy resists is hard-coded into the game. It can't be modded.

What you want is a mod that adds the "Ignore Normal Weapon Resistance" flag to every weapon.
Or, a mod that makes all Daedra type enemies into Creature type enemies.
I couldn't find mods that do either of those things.

But you do realize that it doesn't have to just be a Silver weapon. You can also use Dwarven, Glass, Ebony, Daedric, or any weapon that has a Cast on Strike enchantment.
There's no such thing as "silver only" enemies.

Silver weapons themselves have no special effect against daedra or undead (besides the obvious Ignore Normal,) they only deal extra damage against werewolves.

Unfortunately I tend to stick to iron or steel weapons, but nvm.

It would be very simple for you to make a mod that changes every Iron and Steel weapon to "Ignore Normal Resistance."

Its fine I'll stick with my trusty silver dagger.