gdm startup window manager and other program

[E0x <samudhio@gmail.com>]

hello i use pekwm ( window manager ) i choose and make it my default session in gdm but i want startup some programs after pekwm startup , pekwm have they own startup scritp but i dont want use it because when i restart pekwm for something reason the startup file is reading again and the program set in it run again to

with gdm i try ~/.xsession file , ~/.Xclients , ~/.Xsession , and dont work , even a file in /etc/X11/Xsession.d called startup ( i read that in some website ) but dont work , any idea ? 

thanks