Updating the Firmware of Aztech DSL1015EW(S) Wireless Router

While searching for its user manual, I discovered that Aztech has a similar retail model called DSL1015EN(L), whose latest firmware on their site is compatible with the DSL1015EW(S) router. The former's firmware, though of smaller major version, is less restrictive and has more generic settings - like having the factory default SSID prefixed with "Aztech". This post talks about how to go about updating the firmware and logging in.