I tried both methods, got some DLLs. But nothing appears in the 'ODBC Manager' 
inside 'Configuration Panel' (I apologize but I must guess the english names 
from the french ones !).
Have I missed something ?
I posted the same question on pgsql-odbc(at)postgresql(dot)org 
<mailto:pgsql-odbc(at)postgresql(dot)org> !
Best Regards
The Foxil