mr-E : the 12 USD card seems to require some "Programmer" (there is such a connector on the board", and the picture says "PICFLASH-2" ... What is the cost of this piece ?

MackRackit : I also do have some dust at home ! Let me read chapter 3 before asking how can I do this magic. In fact, I have no "final" board, just playing at home, so the "plug-here", "unplug-and-move-there" is not such a problem to me .... (;-)) .. yet.

THANKS a LOT all (both) of you ! Ramon.