lisp evaluation. Lots of questions

Hi All,

 When I find some lisp code that I want to use ( 
http://www.cs.berkeley.edu/~russell/code/utilities/binary-tree.lisp ) , 
what is the easiest way to get it in skill ?

 Is there a way to turn this to skill ? Or a private func that does it 
out-of-the box ?

 How about the reverse ? Is it possible to turn skill into lisp ? Are 
there bison/lexx files ( or another, equivalent, formal language 
definition ) for skill ?