About, how to sew, written there. And if you are a no-no in English, then read better there .
About, how to restore back to the factory firmware, Read is there
In general, so as not to bother because, as it is written in the instructions, Try to flash through Web-interface. I ask only and. But first it is necessary to make recovery ORIGINAL Firmware via Asus Firmware Restoration Tool, and then pour already alternative firmware. In another post on my blog people are interested, how to flash this router. Just this Tulza and you will be sewn to the original without question.
VERY IMPORTANT: Check your device's audit. Alternative firmware for now only available for audit A. If you audit B1, then you have to wait, is done and for her alternate firmware. General for audit B1 has a beta version of firmware 7.0.0.26 . You can download it is there