Hi Alex,
The ODF is not a .txt file... it is an .organ file (it looks like you don't have file extensions showing in Windows Explorer and therefore cannot see which file is an .organ file - see
http://www.wikihow.com/Disable-Hidden-File-Extensions-in-Windows-XP to enable you to see them). The Jeux D'orgues 2 has three of them to choose from: stiehrextc30a.organ, stiehrextc60a.organ, and stiehrrdc30a.organ. The 30 and 60 in the name gives you the number of combination pistons configured.
Open stiehrextc30a.organ with Notepad. The beginning should look like this:
;############################################################################
; Stiehr-Mockers, Eglise Protestante (1843)
; Samples by Joseph Basquin -
http://www.jeuxdorgues.com
; edited for Hauptwerk by Jonathan Orwig
; MIDI Programmer notes: Reversibles PrCh 100-124; Divisionals PrCh 1-8
; Generals PrCh 12-41; GC PrCh 99 - suggested Hauptwerk output volume 25%
;############################################################################
[Organ]
HauptwerkOrganFileFormatVersion=1.20
ChurchName=Romanswiller, Eglise protestante
ChurchAddress=N/A
OrganBuilder=Stiehr-Mockers
OrganBuildDate=1843
OrganComments=Prepared
RecordingDetails=Recorded 2000
InfoFilename=www.jeuxdorgues.com
NumberOfManuals=2
HasPedals=Y
...... etc .....
Now scroll down a bit a you will see the Manual Definition section:
[Manual000]
Name=PEDAL
.... etc ....
Then the coupler section, and then the section you're looking for, the stop section - looks like this:
;STOP SECTION****************************************************************************
[Stop001]
Name= Soubasse 16'
NumberOfLogicalPipes=32
.... etc ....
This is where you will configure the Stops to respond to the computer keyboard by changing the 'ShortcutKey=052' to whatever number you want this stop to respond to.
Hope that helps!!
GrahamG