Sorry cant help -I noticed you posted the other night in Sport as i was thinking of getting one.
Did you get it second hand if thats not too cheeky?
I was put off a bit by the computerised bit personally as I knew it would be dead helpful but I also knew I wouldnt know how to work it.
I'm not sure of a better site to answer this -why not try EBay and see if anyone is selling one then offer them a couple of quid for a copy of the instructions???