[LE] How do I add collision/physics to a new model for an item?

[Xoronium]

Hey guys,

I've been attempting to add a new model to Skyrim. This has been fairly successful, and I've ended up with a textured model in Skyrim assigned to a new item. However, the item is non-interactive (I can't pick it up after dropping it), I cannot collide with it, and the item is floating where it spawns.

I've been reading guides on armours and weapons, but I can't find exactly what I need.

Cheers.