> I'm trying to play with the refactoring engine through omnibrowser but i
> want to limit the namespace where the refactoring is applied.

Just a few seconds ago I published a version that does exactly that.
Make sure that you fetch the latest version from my repository:

http://source.lukas-renggli.ch/obaddons

Untested code, so be careful ;-)

Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch