Hello there :) 
the prefab you just downloaded  was made by me, Conny jonasson 
it a prefab of a NUKE also known as oakbtgtbybttsa  ( short for One Ass Kicking Bomb That Going To Bomb You Back To The Stone Age) 
i made it in about 2 hours  and it has its own Wad file 
[that i also made :) but the texture are from a model 
from opposing force ] 


it has
18 solids
and 116 faces

and if you use this in your level [ that includes the wad ]   
please  mail me  at  ssolid_@hotmail.com so i can take a look at it :)

TAKE YOUR TIME TO LOOK AT SOME OF MY OTHER PREFABS 

the scruber droid  ( from starwars the phantom meance )
the Delorian     (from Back to the Future movies )