rules for specific groups

[daniele.g]

I follow a group relating OpenCV on YahooGroups, this group is available
also on Gmane, I can read this group with Gnus but writing on it is not
so simple.
The group on Gman is gmane.comp.lib.opencv
I need that all my post on that group are adressed to
OpenCV@yahoogroups.com and using a different email address.
How can I achieve this? Using a posting style? Modifying the group
parameters? 

Any clues?

Thanks in advance.
-- 
Legge di Young:
        Tutte le grandi scoperte si fanno per sbaglio.

Corollario:
        Piu' grosso e' il finanziamento, piu' tempo ci vuole a fare lo sbaglio.