And a Part For Artie?

A musical based on the rue story of a teenager who murdered two 16-year- olds while wearing a nurse's cape? Sounds like a job for Quentin Tarantino, But it's the work of an artist Bob Dole probably likes much more:  PAUL SIMON.  The singer-song- writer-ethnographer, who says he's "not generally a 

fan of musicals," is writing The CapeMan with Nobel laureate  Derek Walcott and plans to bring it to Broadway next year.  In a publicity stunt casting call last week, young acappella groups competed in a    doo-wop    contest.  The winners, TROY JACK, JAMAL REED, KEN MCKLENDON and JOEDY IMBERT, had the voices for Simon's musical but not the attitude.  They want to give the $5,000 prize money to their churches.