For anyone always wanting to know, but too afraid to ask.... 
The basics are somewhere on the forum, but here it is again. 
			
			
			
				cool, thanks for sharing, i will play with this at some point
			
			
			
				Thank you Ulco.
			
			
			
				bonus and tres handy..gratias .  ..   ...
			
			
			
				
Thanks Ulco  :)