Can a wireless guest network be extended?

Our church has two Airport Extreme Model A1354. Our main wireless network, called FCCAK, is extended just fine throughout the building. Our Guest network, called FCCAK Guest, is not reaching the basement, and it looks like that network is not being transmitted at all from the extender Router. The Airport Extreme Utility has no check box on the guest network Tab to "extend this network." Can we extend two wireless networks using our two Airport Extreme routers? We bought both of these at the same time in March 2010.