Code:
// 712: ShowPartySelectionGUI
// Brings up the party selection GUI for the player to
// select the members of the party from
// if exit script is specified, will be executed when
// the GUI is exited
void ShowPartySelectionGUI(string sExitScript = "", int nForceNPC1 = -1, int nForceNPC2 = -1);
Hardcoded.