don't worry about DID porting. It is done. I port it before closing the cellphone account.
i've setup a VPN for that. Did not want to have my sip port open to the world ...
i did not directly edit conf file like they suggest. I used it as a basis to configure trunk in freepbx
i'll try to get a log for you.
EDIT : i've alreay post a part of the log file in the beginning of this thread. Can you look at it ?