you already have an adsl router set right? and now you want to connect the wifi router to the existing adsl modem right?no need to change anything in the adsl modem router.in the Netgear wifi router, dont do any changes in basic settings, keep internet ip,dns to get automatically. set the lan ip address to 192.168.1.2 (assuming the ip address of adsl router is 192.168.1.1). turn off dhcp in wifi router. connect lan wire from adsl modem to one of the LAN ports of wifi router.on your pc, keep ip address and dns to get automatically.you should be able to connect now. 