Perhaps if the two of you read the content of the audio threads you'd give this guy a break because they do nothing to answer his question.
As far as I'm aware there are no open-source 'instant' drag-n-drop music packages, no. You'll have to make take the plunge and, as Gruso said, put a little time learning how to use a more advanced piece of software.
Bizarrely enough probably the closest thing you'll find to an instant music software is a Tracker. I say bizarrely because they have the least modern and easy-on-the-eye interface. On a basic level, you import a selection of samples as individual instruments. You then select what notes to play each instrument with at any given time by filling in a grid that goes down the screen. For simplicities sake we'll say that each instrument has it's own list, and lists are tiled from left to right across the screen.
If you're using Windows you can do a search for mod plug tracker which is a simple tracker app. There will be apps similar (though not identical) to this for the Pandora
