Maybe i could add the stern of "Frigate_Sat" on top of "PiratFrigateSat" and "PiratFrigateExSat" with the TOOL and make the bortoutfrigate_sat.tga.tx transparent on everything except the stern and cutting holes for the windows?
I don't know if this would work and it seems a bit extreme to me, but who knows?
Right now i am away from home, so i don't have access to my PC and files.
When i get back home, i will try making this.
Hope, i succeed.