Over the course of a five-decade career, Jimmy Castor did it all.  The multi-instrumentalist, singer and songwriter got his start singing doo-wop in the 1950s, inspired by his school friend Frankie Lymon.  Frankie gave Jimmy a big break when he recorded his song “I Promise to Remember.”  Soon, Jimmy was singing with Frankie’s brother Lewis Lymon, playing his trademark saxophone as a session musician, and recording his own sides for labels including Hull, Jet Set, Decca and Smash.  Along the way, he picked up fans including Sammy Davis, Jr., and formed The…