I've got the E2000 running on Tomato Firmware. Wireless from it works fine on the 2.4GHz/20MHz. I've got the firmware set that only one PC's Mac Address is to receive wireless, and it works fine on the 2.4GHz. All other connections are hard wired, except that one of the hard wires goes to an Airport Extreme sending G wireless to a Mac Mini.
Now back to the PC that I'd like to have running on 5GHz. It has an Asus wireless card with the latest driver from Asus that I installed and it is supposed to get 5GHz. Yet, when I set the Tomato firmware to 5GHz the PC cannot connect.