in RolePlayingGame.cs
// add the audio manager
AudioManager.Initialize(this, @"Content\Audio\RpgAudio.xgs",
@"Content\Audio\Wave Bank.xwb", @"Content\Audio\Sound Bank.xsb");
in Content\Audio I see RpgAudio.xap, but I do not see the xgs, xwb and the xsb files. What are these? and are they compressed INTO the .xap file? Can somebody expand on this a little?