My girlfriends laptop HD has died and I have a new one ready to slot in.  However, both her Snow Leopard disk (boxed not grey) and Leopard disk (gray)  are in Ireland (we are in the UK).  
I have my Snow Leopard (boxed copy not grey) that I used to upgrade my laptop right here next to me. Can I use it to install an OS to her new HD or is there some licence identifier or code that gets installed that will cause a problem if we are both using OS's installed from the same disk?
	
		
			
		
		
	
				
			I have my Snow Leopard (boxed copy not grey) that I used to upgrade my laptop right here next to me. Can I use it to install an OS to her new HD or is there some licence identifier or code that gets installed that will cause a problem if we are both using OS's installed from the same disk?
 
 
		 
 
		