woaw !
Thanks so much, going to try that .
In the meantime I was wondering with the multi-wan component : according to the fact that my 1st lan interface is 192.168.100.1 and is acting as the gateway for my standard network (computers) ; if we have the source-base route with that ip address (192.168.100.1) to my 1st wan interface.. all the traffic from 192.168.100.1 should use the 1st wan interface ?