Auto baud canbus

Hi.
I have googled the above subject but found very little on the subject.
Having failed at my first CanBus project I now need to go back to basics and check every thing I think I know.
B.T.W. this is related to This topic. Arduino Forum
I am now checking that the Bus speed really is 138.24. As I have had any proof that I am connecting to the bus.
So the question is :- Is there a method do setting the CNF1 CNF2 CNF3 registers do a test read if none redo registers and test again untill a read is found.
Or a sketch that will do the above.
I am also in the process of setting up my own CanBus (room to room ) just to test the system.

Regards Antony.