Nice one badger, I think cyclist are generally much more helpful than motorists. In my experiences their have been many times when I have either had a flat or a crash :S and motorists will cruise on past completely oblivious to my existence, where as many cyclist have stopped and helped me or even simply waved stopped just to make sure everything is ok.
As for helping motorists a few months ago a young 'boy racer' flipped his fiesta right in front of me on the Thorpe road out of Egham narrowly missing another cyclist. As the car came to rest wheels still spinning on its roof i jumped off my bike and ran to the crash. The young fellow was quite a mess and had an arterial bleed from his wrist. He crawled out of the car and collapsed, myself and the other cyclist put him in the recovery position and elevated his arm called an ambulance etc. What really got to me was the stupid little man driving a jaguar who had also witnessed the crash getting out of the car not to help as you might think but to shout at the boy tell him what an idiot he was and then to threaten police action. I understand that this man has a point but really? does it have to be made while the guy is bleeding out on the floor?
As for using bike parts as medical equipment my pannier bag was the perfect height to be used as a cushion for the lads head
Again well done badger a medical kit is swiftly going to find its way into my bag.