| Hi Craig,
I had to bypass my Datatool System 3 at silverstone last year. It's an absolute doddle so don't fret too much. Just trace the wires back to the key points on the loom (usually ignition, fuel pump,etc) and rejoin the original connection. I marked all mine with little tags of masking tape to make sure I could re-patch it after.
Don't worry about the no essential points (indicators, horn) as they can either be lived with or disconnected using the original connectors.
If all else fails just get the bike there and bring some insulation tape and a pair of wire snips!
Cheers,
Ali | 
Linear Mode
