[rt-users] adding button to ticket page

[prescott at wcoil.com]

What is the proper way to customize rt to add a button into a ticket so I 
can perform an outside function?
What I want to do is to have a label printer print a address label from a 
ticket.
This would be done when the staff person is adding the ticket.
this should not be done for all tickets, and it only needs to be done on 
demand.
I can use the ticket id to look up the correct information, I just don't 
know how to go about customizing for this...

Thanks in advance.