You cannot do it.. if you want to extend wireless you need the correct wireless repeater and either universal or specific Netgear for the job.
Apple routers cannot extend wireless from anything but other apple routers.
In your case either ethernet.. or EOP adapters to a new location where you use the AE as an AP and switch.
Or you buy a second (cheap second hand AE perhaps) apple router and extend wireless with it plugged into the Netgear.
In general I would not recommend using the router in a netgear cable router at all.. turn it off and use your AE direct.. who knows, it might reach your clients .. the netgear was a noted bomb in the wireless and routing stakes.. most people turn off both. Just use it as a dumb cable modem.