Hi John;
The solution turned out to be simpler than I thought, the only relevant part of the code is the custom event ID 69635, switching this to a value of 1 initiates the start sequence so it was very simple to assign this to a switch. In the end I just added these entries to the FSUIPC.ini file.
[LvarOffsets.CF-104]
1=L:starter0=UB0xA001
2=L:starter1=UB0xA002
[Buttons.CF-104]
1=PE,30,Cx0100A001,x01 -{offset byte set, offset A001}-
2=UE,30,Cx0100A001,x00 -{offset byte set, offset A001}-
3=PE,30,Cx0100A002,x01 -{offset byte set, offset A002}-
4=UE,30,Cx0100A002,x00 -{offset byte set, offset A002}-
5=PE,30,C69635,1 -{Custom control: <69635>}-
6=UE,30,C69635,0 -{Custom control: <69635>}-
I'm learning :), Thanks again for your reply and for a great piece of software !
Glen