9 October 2015, 15:26 UK time / 16:26 CET: 
There were some issues with the second script (version FINAL.ver2). I have deleted the old upload and uploaded a new version with the exact same name. If you previously had issues with that version of the script then IT SHOULD NOW WORK AS INTENDED. I do not expect I will have to make any further changes to the script, (part from the slight possibility that a future game update somehow renders it out of function or obsolete, in which case I will of course update it).



Multifunctional Right Mouse Button 
           (and other tweaks)
 
 
   This is a straightforward Autohotkey script that
  I created with Autohotkey to be able to play the
  game (mostly) with only having to use my mouse.
  With this script (and my recommended keybinds)
  you really only have to use the keyboard in game
   when you quicksave/quickload.

  The script does 3 different things with the same
  mouse button (right mouse), by allowing you to
   click/hold (default), double click for entering
  scouting mode (added with this mod) and hold
  to show interactables (also added in the script).
  There are also some additional tweaks for the
   extra side mouse buttons if you own a mouse 
               that has extra side buttons.

  THIS SCRIPT IS SPECIFICLY WRITTEN AND INTEN-
  DED FOR PLAYERS WHO ENJOY PANNING THE
  CAMERA WITH RIGHT MOUSE BUTTON INSTEAD
  OF MIDDLE (DEFAULT), AND THOSE WHO WANT
  TO HAVE AS MANY KEYBINDS AND FUNCTIONS AS
  POSSIBLE MAPPED TO THEIR MOUSE INSTEAD OF
  THE KEYBOARD HOTKEYS.

  In my script I do suggest some specific keybinds
  that I recommend you use. The reason for this
  is that when use the same button(s) for multiple
  functions (binding more than one hotkey to the
  same mouse button) then I find that some com-
  binations work much better than other combi-
  nations. Some combinations do not work at all.
  You are of course free to experiment and try
  to find your own preference if you wish. My
  suggestions are only included in the script be-
  cause I found them to be functional together.

   These are the three hotkey changes I strongly suggest you make in the Pillars of Eternity game keybinds
    menu ([ESC*] Options --> Controls) in order for my script to fully work as intended:           (*) = ESC is the default key to open Options)
                Formation rotate - middle mouse button   (Formation Rotate is what I mean when I use the <incorrect> expression "Toggle Formation" in my script)!!!
                        Pan camera - right mouse button
                        Pause game - top (upper) side extra mouse button
　
                                       This applies both if you use version FINAL or version FINAL.ver2
                                                         　
  The rest is configurable inside my script when you right click and chose "open with..."
  Notepad or any other text editing software.
　

 
You need to download and install 
     Autohotkey for this to work: 
 
  http://ahkscript.org/


Installation:

  Go to http://ahkscript.org/ and download and install 
  AutoHotkey. Then download my file and then unrar/
  unzip it. Then instead of double clicking it to launch
  it as an AutoHotkey script, first you should right click 
  it and chose open with... and chose any text editing 
  software. Notepad is fine. Then read the text so you
  know what the script does. There are also instructions
  for you if you wish to make any changes to the script.

  When you are done reading/customising you can save
  and close. Remember to keep the file extension name
  .ahk  in case your text editing software wants to re-
  name it to .txt or .rtf or anything else. It needs to be
  .ahk for AutoHotkey to be able to read it as an Auto-
  Hotkey script.

  After that you can simply double click it to run it as
  AutoHotkey script. Remember to do this every time 
  you play Pillars of Eternity.

   Enjoy.
 
  P.S. I: Feel free to edit the script to suit your own
  needs for this game or other games if you want.

  P.S. II: There are two downloadable files, Version
  FINAL and Version FINAL.ver2. You only need one.
  Do not use both at the same time.