applets launch from jnlp files

I was reading on the net that, “The most significant new feature of the next-generation Java Plug-in is built-in support for launching applets from JNLP files. Using the JNLP file format as the applet descriptor allows applets to instantly reuse JNLP extensions previously written for Java Web Start applications, and significantly expands the capabilities of applets in many other ways”.

Does anybody have a simple example for launching applets from JNLP files?

https://jdk6.dev.java.net/plugin2/jnlp/

“Application has performed an illegal operation and will be terminated” while playing the first of the demo levels :-\