Im confused as.

Just got a $9 Thomson ST536V6 single port router

I have an existing DSL G604T Gen2 4port Wifi Router

I would like to use the D-link as an AP and connect this to my connection via the Thomson.

The Thomson connects to vodafone/ihug with no problems, however I cant quite seem to get the settings correct for the DSL to see and use the Thomson as the gateway.

Should I be playing around with the WAN settings on the DSL?