strange request (continued)

[cartier@mipsmath.math.uqam.ca (Guillaume Cartier)]

Thank you all for your replies about my strange request.
Unfortunately all the solutions I got fail because of
one point I failed to make clear...
The problem is local variables:
  something like (let ((a 3))
                   (var a))
will fail with all the suggestions I got because they
all presuppose that the variable references would only
be global ones.
In conclusion the problem is still open to any suggestions...
-- 
Guillaume Cartier
cartier@math.uqam.ca
LACIM, Universite du Quebec a Montreal.