That depends which method you use. Use the .git file and look up the appropiate door, and then TransitionDestin. The entry here referce to s string in dialog.tlk. If the entry exist, you can look it up in dialog.tlk (which is preferable, as that would make it International :-) ). If it does not exist, right click on TransitionDestin and type in the desired data. (-1 means, there is no connection to dialog.tlk.)
You might find my tutorial interesting:
http://lucasforums.com/showthread.php?t=185991&highlight=anatomy)
Thanks! I've seen your tutorial before but at the time I wasn't looking for that. :D