How To : Load Multiple XAP files in Silverlight Application

Currently i am working on a project where i had a requirement to load multiple xap files in a silverlight application, or let me keep this way i need to load xap files OnDemand. I was going through this article on msdn where it explains about "how to load assemblies on demand", before reading this article i really had no idea of how to load multiple xap files, but now i have done that yipee... :)