Thanks to all for your help and answers. My deadline is now, so I won't
be able to take into account later comments, but I think I could answer
the questions in a satisfactory way. I will try to keep this list
posted on this article when it is published.
Cheers.
---------------
Francois
Home page: http://www.monpetitcoin.com/
"Would Descartes have programmed in Pascal?" - Umberto Eco
