-To create a tag, at least the way i do it, is to create a single polygon and delete half (because we all know quads are 2 tris connected together) at least in 3d max.
Lightwave can open .obj files, there's tags included with kyle's saber, feel free to use them, you might need to fix pivot orientation:
Tags are kind of bitchy depending on the application you are using, for example the coordinate system is not the same in max as in modview/JA, sometimes you have to rotate the pivot point to match the game engine's XYZ system.
-In max we use the link tool...it's that simple.
-Weapons do not have bones, even complex ones are probably animated within the .md3.