Folks, I need your knowledge here.

Think about the following sittuation - my app need to set my iphone to vibrate mode on a certain time and get it back to playing sounds mode (for call receiving, sms, email, all common sound notifications) some minutes later.

I've already googled that, and didn't find a good, apple accetable way of doing that:

http://stackoverflow.com/questions/736047/possible-to-programmatically-open-settings-app-from-iphone

http://stackoverflow.com/questions/702319/is-it-possible-to-dynamically-alter-an-iphone-apps-settings-page-in-the-settings

http://stackoverflow.com/questions/1141391/display-iphone-application-settings-within-your-application

http://stackoverflow.com/questions/335965/how-do-i-launch-my-settings-bundle-from-my-application [This one here is interesting, as fas I as find a way to know what is the key for the settings I'm interested in]

http://stackoverflow.com/questions/335965/how-do-i-launch-my-settings-bundle-from-my-application [It mentions I can do that, but does not give an idea of how =(]

http://stackoverflow.com/questions/702319/is-it-possible-to-dynamically-alter-an-iphone-apps-settings-page-in-the-settings [If this is true, I wouldn't be able to do what I want...]

Does anyone there has an idea of how do I do that via app? Many thanks in advance.