I tried loading it through the GUI and got Upgrade are Failed error about 3/4 of the way through the load. I got it to work on my home wrt54g v3.06 with no problem. All I am looking for is the Captive portal. I have all this working on my home router but the one at work is newer version 4.20.6 now upgraded to 4.20.7 I read in a post somewhere that this newer version has only half the memory of older versions. Could this be the cause ? 1. Is there a version of EWRT that is compatible ? 2. What is the correct procedure to flash V4.20.6 (7) Any help would be greatly appreciated.