I found this great article on creating Satellite Assemblies, I was not trying to do that but it did help me get resources in to my main assembly. The only thing I found was that the resource files needed to be named with the expected name space in them so I had to rename all the resx files in my build directory so they had the name space on the front of them.

O'Reilly Network: .NET Localization, Part 2: Creating Satellite Assemblies [Oct. 14, 2002]