Recently my RT-N16's port died, i was able to configure another port to function as such using this:
http://www.dd-wrt.com/wiki/index.php/Switched_Ports (second wan port) , and yes i do have tomato usb but that seemed to work just as well
however i can't get it to give me external access through wireless, i guess somehow the wireless port is not getting integrted into the defined VLAN. Mind you, all i did was copy the code that was there, not sure how to modify it to include the wirelss port:
nvram set vlan0ports="1 2 3 5*"
nvram set vlan1ports="0 4 5"
Thanks for your help in advance!