I wants to run more than one instance of my Adobe Air Application, So to do this it needs to be change the ID in "application.xml" file of the application which is present in the folder META-INF of installation directory. But i don't know how to change this ID at run-time.
Does anyone have an idea how to do this or any other process is there to solve this problem ?
You can't change ID at run-time. The only way to run several instances is to prepare several packages with different appID in app descriptor xml - so to have several app descriptors.