Currently this scenario is not supported. You can follow this public issue tracking system item
and monitor the progress of this feature request.
On a side note, I'd like to inform you that we've just released an online tool that allows you to reduce the size of your Silverlight applications. For more information, please visit http://blogs.telerik.com/blogs/posts/10-06-10/telerik_assembly_minifier.aspx
the Telerik team
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Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
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