I believe the Airport Express can only extend the wireless network of an Apple Airport, Time Capsule or other Apple based wireless routers. This is also true for other brands, so if you wanted to extend the Netgear you would need a Netgear extender.
looks good and congrats. hope you enjoy the car like many of us
64GB iPad 3, 32GB iPhone 4, 1G 16GB touch, 4G & 6G Silver 16GB nano, 5G 60GB iPod, 1G AppleTV, 2G ATV, 2.5GHz 17" MacBook Pro