ok thanks , ... I have try but whith f15_00_afterburner, like same name for PTB and helmet ..
"f15_PTB", 0 ,"f15_PTB_12th.bmp",false};
"pilot_F15_00_helmet", 0, "pilot_f15_helmet_Postal2", false};
you can see sample here !
http://server.3rd-wing.net/public/Leb1705/Screenshots/
Thank's a lot .