The screen shots in this page show words in Japanese, but also this app supports English too.
This is the application can register the timers for the manner mode and the Wi-Fi setting.
Usage: When you start the app, the timer list is displayed. Long click an item to show the setting dialog for a timer. The timer triggers at the time of everyday and can specifies the days of week. Short click an item to toggle between On and Off. The timers keep alive even if you quit the app.
Disclaimer: The app may fail to trigger a timer unexpectedly. Use it on your own responsibility.
Invoke the app once again, when you update it. The timers will be set automatically.
Version 1.2 fix up. (2012.4.30) -- When the application was invoked, the disabled timer also was set.