L&LD
Part of the Furniture
Installing RMerlin firmware is as easy as doing stock Asus firmware: point to it in the gui (simply click on the firmware version to go directly to that page) and click Upload. Wait 3 minutes or so and then reset to factory defaults.
Now, manually and minimally configure the router to secure it and connect to your ISP.
Done.
Now, manually and minimally configure the router to secure it and connect to your ISP.
Done.