I know it can send it out automatically with all the relevent details - But I've always liked the personal touch of contacting the customer with your own messages.

All i wanted was to know  was the {code} to use which automatically enters the tracking number.

I use a Courier that is not listed in the drop down menu when you enter the tracking number, even though i enter it in for the customer to see. There has been confusion in the past with some customers because of the name of the couriers i use.

Doing a personal message helps to explain where to go to obtain tracking information on the couriers website.

I use a standard message and just alter with their tracking number. But instead of bombarding buyers with automatic messages and my own, i saw a way to add the personal touch to the automatic message eBay sends, i thought that would be better! So, I found how to add the personal message... but just need to know the code that adds the tracking number relevent to their purchase in what i have sent them.