Help Installing Wolfenstein to Jtag

I have downloaded wolfenstein the new order torrent and extracted each iso to its respected disc folder (4 discs). after looking at tutorials, it seems that i need to convert the iso 2 god format. Using iso2god, i try to import the iso but it says that it cannot locate default.xex. i tried extracting the iso with an image creator but then it is no longer an iso file. How do i fix this?