Item Help

[Bumbee]

Ok, I'm using a model viewer and ai found the model for Mith Marr's sword, but it's a mesh, so I cant use it for a weapon, I must know how to do this:( I tried using the fullname of it as the itemid, but it's invisible, I know it can be done I saw it once, I also tried with Rallos's Axe, but no go, PLEASE help! I dunno whats to do:(

Thanks,
Bumbee.