to set a wireless router you have to connect it first to the internet using the internet slot (sometimes named (wlan)and also connect the computer (for now ) in the first port on the router ..and in the Lan card on the computer ..using either a Lan/usb cable if the router has the ports on usb ..or a Lan /Lan cable (RJ45 plug)..
After all are powered and on ..you have to type in the browser (IExporer for ex) ..the address of the router..so that you will get to the log in page for the settings needed in the router ..(set the connection to the main internet ..and also settings for IP range to be assigned for the 4 ports..and to set the wireless parameters ..
To get to this page you have to see the router's IP ..(written on the sticker on the back ) ..and type on the browser like it follows:
ex.http://192.168.1.1 and hit enter.or type any of these ones
and will have the same effect
a window with a log in tab will appear ..and you will have to complete the spaces for admin with the word admin and for password with the word password ..
these being the default set from factory and can be changed in the settings if you want to ..
If you have a broadband modem based connection ..you will need to change the router's default IP with a much simpler one for not to get into conflict with the modem ..so my advice is to set one with 2 digits ..like 10.10.10.1 or so ..It will be easy to remember and sure not to get in conflict ..cause the router also will assign the ip -es for the computers in this range ..(sometimes the modems have similar factory IP and will be in conflict cause the modem will became the default gateway for the router..when you set it ...
I will link the official manual in case you do not have it ..and there is even explained the wizard setting ..and the manual opne ..The idea is that the wizard setting will not be complete and will only set the router for a wireless connection or for to connect to one port ..It best to do it manually and complete.
Here is the manualftp://downloads.netgear.com/files/WNDR4000_SM_03NOV2010.pdf
you will need a pdf reader to open it ..such as Adobe reader ..
Good luck ..!