Here is additional information on the 2020, on a provisional basis.
To configure the 2020 via its web interface, point your web browser to:
http://192.168.0.1:64680/
Note the special port number. You should get a web page. Click
Login. On the login panel, enter User name
user and Password
user: they both have to be lower case throughout.
Click tab
GATEWAY.
On the left hand panel, you should now see "Advanced Gateway Setup" and an entry underneath "Forwarding" which when clicked will enable you to configure port-forwards in the right-hand panel.
This gives you all the facilities of a normal SOHO NAT router, so the Netgear is really surplus to requirements: just use the 2020 as your NAT router. For wireless, use a Wireless Access Point rather than a Wireless NAT Router.