Now, the article talks generally about creating a JAVA ME program without the use of an IDE so it was a bit of a work around to get the thing to work using Netbeans. So here are some additional notes.
1. The mpowerplayer sdk comes with a tutorial folder. I would recommend reading this page
2. You need to make a few changes to the manifest file in order to make the application work. In order to change the manifest file using Netbeans (manually changing it in the project files will not work as soon as you hit build again). Right click on the project and then add the Midlet name in the application descriptor (refer to image). This adds a midlet-1 tag to your manifest file. Just make sure that the name of the midlet corresponds to your specific midlet name.
So thats about it. I am a newbie to this technology so hopefully this article helped.