I need someone to modify a blizzard skin(Easy)

[gabriono]

I want the skin of Orc Barraks without but i suk at skinning, if you could remove the door please? i tried but when imported it will remove all the walls.

The original skin:

 

[Geries]

Why not removing door in the model file?

 

[gabriono]

"i tried but when imported it will remove all the walls." I said i cant, i dont know what i did wrong. Ty!