So I'm going to setup a dd-wrt. I'm going to buy a ASUS RT-N16 for the router. I currently have a D-LINK DSL-G604T adsl router. Can I use this as the gateway for the ASUS? I presume I disable all but the adsl on the D-LINK and then somehow put it in bridge mode. Does this mean that the ASUS is setup with the ADSL username & password?