scripts that run when we type startx

Hi,

I need to execute my program when Xserver is loaded( ie when we type startx 
from text mode). So can anybody specify the shell script into which i can 
incorporate my executable, so that whenever Xserver is loaded my application 
also runs during the loading.

I tried to incorporate my executable in /etc/profile file but it works only 
when your runlevel is 5 during booting ie in /etc/inittab ur runlevel is 5. 
So what is the option for me to run my executable application when my 
starting run level is 3 ie textmode so that my application runs when Xserver 
is loaded.

Please suggest me some solution, which script can be edited to load run my 
executable application when we type startx to load Xserver.
Actullay my application works only after Xserver starts loading.

Karthik