I casualy found the document here referenced, red it and found it very enlightening and was about to open a new thread about it when I wondered if it wasn't the case that it had alredy been discovered and reported in this forum... which obviuosly was the case, as a search confirmed.
So I limit myself to a bump-bump
('cause I bet there are new user that will be very intrested in reading it too).
The link of the whole index, just in case:
http://aobauer.home.xs4all.nl/index.htm