Easiest way tis with special effects, although abilities if needed if you are doing a rpg-style map where weapons and shields are picked up. Fisrt you have to upload the battachment (wether a sword or whatnot) into you iport manager. Save, reload map. Then you set up a trigger with an action of: "special effects- creat a special effect on unit (body part) using (imported .mdx).
-VGsatomi