This can be done without scripts.
Set events for each party member, name them after the characters. (exclude player character.)
You first transfer events to your player character, have a switch happen for each one so their graphics on page two of their event pops up, set Through to On and have them move to their proper location, making sure to uncheck 'Wait'
The last thing you want to move is the player character, which will have 'Wait' checked. All of the characters will move to their proper places simultaneously.