Thanks a lot for your responses... if you are interested, here is one site of mines about the french bluegrass musicians. We meet every year in the center of france and are about 100.
http://www.chez.com/hillbillies
In the all of France there are not more than 300 people praticing Bluegrass....
Following your advices i contacted G. LIghtfoot and submited him my adaptation of "song for a winter night".....let s wait for the response ...