Stupid question.. Nifskope "show collision" button doesnt work

[DiodeLadder]

For static meshes, if you already have specific collision meshes made for them, you could change the "shape type" property to "mesh" (default is "convex hull") as this would give you the exact collision mesh you've made when exported. I think Convex Hull, or Capsule are more appropriate for dynamic physics objects, like stuff you can drop.

 

By the way, if you look in the Collision Layer section of CK, it will tell you the colors used for collision meshes showing in viewport + F4. You could use this info as a reference to determine the appropriate collision object types for your custom assets.