too lazy to look up screen shots/ man on the router. But setup is straightforward.
On router go to wireless, remove any wireless security settings, set it to assign dhcp address's, select a channel number, make sure it broadcasts the ssid, change ssid to something u will recognize.
On ur mac, make sure airport is on, select the wireless network, connect.
Test connectivity by pinging etc..
then move on to changing security settingts