Hi everyone, I got this mod working on P3D v4

Use the modified intructions below:

1. Installation of Required Files
=================================
a) Place these 2 files into the ISG installation folder:
     Example: 'C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\ISG'
     'ISG_Control_CS737.xml'
     'B737_Ctrl_Cntr.xml' 

b) Place theses 2 files the into the 'ISG\Aircraft' folder:
     'B737-200.cfg'
     'B737-200.prf'


2. Panel.cfg Changes
====================
*** ALWAYS make a back-up first before modifying!!!

Add to the end of the [Window Titles] section:

WindowXX=Smiths FMS
WindowXX=Navigation Display
WindowXX=EFIS Control

Where 'XX' is the next available logical sequence number.
Example:
Window08=Smiths FMS
Window09=Navigation Display
Window10=EFIS Control


3. Add Icons
============
*** NOTE: If V-One is NOT installed ***

[Window01]
size_mm=36,144
background_color=1,1,1
position=6
visible=1
render_3d_window=0
type=special            //optional; keeps icons alway visable
zorder=99
ident=12101
gauge00=Captain_Sim.x737.anim!icons,0,24,36,120
gauge01=isg1!LNAV, 0,0,18,24
gauge02=isg1!FMS2_OPEN, 18,0,18,24


*** NOTE: With V-One installed ***

[Window01]
size_mm=36,168
background_color=1,1,1
position=6
visible=1
render_3d_window=0
type=special            //optional; keeps icons alway visable
zorder=99
ident=12101
gauge00=Captain_Sim.x737.anim!icons,0,48,36,120
gauge01=..\..\CS_B737-200\panel\V-One!v1_Icon, 0, 24, 36, 24
gauge02=isg1!LNAV, 0,0,18,24
gauge03=isg1!FMS2_OPEN, 18,0,18,24


4. Add New Windows
==================
*** NOTE: Change [WindowXX] to the same number sequence used in [Window Titles] section.

[WindowXX]
;Smiths FMS
Background_color=0,0,0
size_mm=501,386
window_size_ratio=1.000
position=8
visible=0
ident=4012
window_size= 0.220, 0.567
gauge00=isg1!SMITHS_FMS,0,0,501,386,B737-200
gauge01=..\ISG\!ISG_Control_CS737, 0,0,1,1
gauge02=isg1!Server, 1,1,1,1

[WindowXX]
;Navigation Display
Background_color=0,0,0
size_mm=188,300
window_size_ratio=1.000
position=0
visible=0
ident=4011
gauge00=isg1!HW_B737_ND,0,0,188,300,WN
gauge01=..\ISG\!B737_Ctrl_Cntr,173,283,10,15

[WindowXX]
;EFIS Control
Background_color=0,0,0
size_mm=140,130
window_size_ratio=1.000
position=0
visible=0
ident=4013
gauge00=isg1!HW_B737_EFIS_CNTR,0,0,140,130,WN
gauge01=..\ISG\!B737_Ctrl_Cntr,0,4,10,14


5. Add Navigation Display in Virtual Cockpit: Optional
======================================================
*** NOTE: Click-spot is center of radar screen ***

[VCockpit11]
size_mm=1024,1024
pixel_size=1024,1024
texture=$WXSP
background_color=0,0,0
gauge00=isg1!HW_B737_ND_NB,35,500,225,225,VC

6. Add this line under [VCockpit01]

[VCockpit01]
...
gaugeXX=ISG1!Server, 1,1,1,1