Also experiencing a similar issue at the same step while following the installation guide for CoovaAP:
http://www.hotspotsystem.com/installation-guide-coova

I noticed that the “ROUTER SETUP COMMAND FOR THIS LOCATION” lists only “OpenWrt” under firmware and “CoovaAP” is not an available option as the installation guide states.

See attached screenshot:
http://oi40.tinypic.com/2jg0zzk.jpg