Can someone help me understand how to use Dargor's Shadowrun dialogue script?

[RupertPudgington]

Hi. I am new here, and to new to rpg maker xp as well. I was browsing through the script forum and came across dargor's shadowrun dialogue.
EDIT=My original problem was initiating the script.
I messed with it for awhile, and figured it out by trial and error.
I still have a question though. Can someone tell me if this script is modifiable to make it show a different player face, depending on who is party leader?

Also, I am having trouble figuring out how to activate switches and use switches in the script.



Here is Dragor's script

Spoiler

#==============================================================================
# ** Shadowrun's Dialogue System
#------------------------------------------------------------------------------
#  Author: Dargor
#  Version 1.4
#  25/06/2007
#==============================================================================
# * Instructions
#------------------------------------------------------------------------------
# - Use $scene = Scene_Dialogue.new(npc_id, npc_name, actor_name, bgm_name)
#   to call the dialogue scene
# - \\k[string] will add 'string' to the keywords list
# - \\c