im allways doing it with every single panel its own way..
something like this:
Code:

---

 
        pan_IVE.visible = on;
	pan_IVE.scale_x = (Screen_Size.x+1) / 1024;
	pan_IVE.scale_y = (Screen_Size.y+1) / 768;
		sleep(3);
	while(pan_IVE.alpha > 0)
		{
		pan_IVE.alpha -= 5 * time;
		wait(1);
		}
	pan_IVE.visible = off; 

---

scales the panel and fades it out smoothly...
can easily be converted to any panel and position.. just enter the panel size behind the scale (ie. 1024 or whatever)