I am forced to run my RT-N66U in AP mode do to the inability to run without my FiOS Fiber modem. I had, for a while, run a double nat network but that cause many headaches and slow connections. Is there any way to have your custom software run a guest network that actually isolates the internal network from internet access. As of now both yours and ASUS official firmware offer the guest network option in AP mode but there is no network isolation. OR is what I ask impossible? Thanks...I enjoy your builds!