Alternatives to PRISM

I am starting a large Enterprise level Silverlight Application, and i am not looking at PRISM since i would not be using many of its capabilities. But i intend to design the application modu开发者_开发技巧lar and use MVVM. What are my best alternatives to PRISM? Thanks.

A good reference is: http://www.codeproject.com/KB/silverlight/IssueVisionForSilverlight.aspx

MEF + MVVMLight