You are missing a file called "Gloss2D2o.mat" in the folder which the 3d of the missile is located. So you could just say copy some Gloss1D0o.mat or something like that from another plane, rename it and put it in that folder inside your F86J mod folder... it should theoretically work. The only thing it can do wrong is make it use the wrong texture, or a texture that isn't there.