Looks like your Netgear router will not work as it does not have a Ethernet WAN port. You really do not want an integrated Cable Modem/Router.
You should get a standard wireless router and connect it to you cable modem.
Something like the Linksys WRT54g is a pretty good option. Other vendors also offer reasonable products. I would not spend more than about $50 and if you did around and are willing to settle for a WirelessB router, usually you can get them with mail in rebates for $5 or under!
Easy way to set up new router:
Power everything off, cable modem, pc, router,
Connect router WAN port to cable modem, connect PC to LAN port.
Power up cable modem, wait 3 minutes, power up router, wait 3 minutes, power up PC and see if you have a connection.
You will probably need to enable the wireless on the router.
Change the SSID and enable some form of encryption to protect yourself and your network.