Nah, I think he just wants to have a party that doesn't include the on-map character.
Very easy, I'll do it in a minute.
EDIT::
Done -
http://rmrk.net/index.php/topic,42068.0.htmlIt uses a variable to control, rather than restricting it to just the first actor. That way, if you ever find the need, you can change which actor it refers to in-game. To fill your function though, all you will need to do is set that variable to 1 in a parallel process immediately once the game starts.
Also, as for the Caterpillar, there is probably no way it will work with it right away - you will need to make some modifications so that the lead actor in the party will be a follower. Every Caterpillar script I know anticipates that the lead actor is the player and so doesn't account for this scenario.