When adding a resource from classpath shrinkwrap should provide a way to choose the specific source for the resource.

MyClass.class.getResource only use the CL from where that was loaded, and there's a need to get the resource from a specific source.
like: give me "resource-x" found where MyClass.class is found.
with that, we can for example pick a specific META-INF/faces-config.xml and not anyone placed on the classpath.