I'm working on editing a few Vanilla Meshes for a Mod I'm working on-- mainly cutting bits I don't want out, so I can use existing Interiors in new ways.

I want to remove certain pieces, therefore-- I can do this in NifSkope or Blender without an issue, but the Collision is a problem-- I can see it in NifSkope, and delete it ALL, but in Blender I can see nothing, and can't change it...

Any input would be appreciated.

Also, how can I see the Oblivion textures in Blender? If possible, of course?

For seeing textures first they have to be unpacked from BSA, then you have to set that folder in Blender. That is set in the header, you expand it by dragging its border downward.

Collision in Blender will be black wire mesh. I think that you'll be able to select it if you break the mesh by material. (Edit mode > A to select all > P to break it)

Thank-you Sorry for the delay in getting back to you