Thats easy! Spalshscrenn;
Code:
BMAP* Splash = "splash.bmp";

PANEL* splash_pan = 
{
	bmap = splash;
	pos_x = 0;
	pos_y = 0;
	layer = 20;
}

function show_splash()
{
   //put here what must happen that your splash screnn show
   set(splash_pan, SHOW);
   wait(-10);
   reset(splash_pan, SHOW);
}


Just call show_splash in main.
Please!
Hope you understand it.