Here are some links of CAB and WPF working together.
http://kentb.blogspot.com/2006/10/wpf-cab.html
http://crescendo.solersoft.com/Home/tabid/53/Default.aspx
http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=2df97749-3d99-4bcc-b561-d1128230628e
http://blogs.infragistics.com/blogs/andrew_flick/archive/2006/08/08/292.aspx
and a few more on CAB and click once (with partial trust)
http://www.peterprovost.org/archive/2005/11/16/9584.aspx
http://blog.gatosoft.com/PermaLink,guid,d0a0dd1e-c9ac-4fa9-a408-615454d49702.aspx
http://staff.southworks.net/blogs/matiaswoloski/archive/2006/04/03/ClickOnceMsBuildCAB.aspx
and a couple more on loading CAB modules on demand
http://staff.southworks.net/blogs/matiaswoloski/archive/2006/02/26/CABModulesOnDemand.aspx
http://www.agileprogrammer.com/dotnetguy/articles/NewModuleLoaderForCAB.aspx