[[LE] Help with making a bow work like Dawnguard Runehammer]

I once created Dragonrend Arrows that worked perfect. They would shoot dragons out of the sky. And for the life of me I can't remember how I did it. But it had something to do with the impact effect setting. There was a lot of trial and error in those arrows. I do recall I didn't have to write or alter any scripts.

[[LE] Merchant inside home mod]

When you are done you should have one BSA and one ESP. The BSA would have stuff like scripts, textures, meshes. It won't need to pack the merchant, just the meshes and texture (eye color, skin color, and so on). Your merchant might still work without the BSA, however it will have the grey face, and whatever script you packed will not work.

[Skyrim Mod Request - Gladiater arena]

Believe it or not: Windhelm has an arena, complete with quests and spectators. The problem is that (for some unknown reason) Bethesda decided to scrap the idea and never finished it.

[Home in Bloated Man's Grotto]

One idea would to be to just copy the entire grotto, rename it and then remove any residual quest related items. By doing this you won't risk the quest, you can make the grotto how you want, and place it anywhere in the world you desire.

[NPC missing default hidden outfit / will not equip clothing fix.]

doesn't the UFO mod do this?

[Home in Bloated Man's Grotto]

That would be a great place for a house. Right in the center overlooking the entire area.

[Mod Request: "Cry For Help!" *Immersion*]

How about a shout that changes an NPC's faction to that which is allied to the player?