This was a rather old thread - if it's not solved meanwhile, can you give a description of your problem?

Such as, which version you're using, how you're adding your files to the WRS file, and your code for reading the files from the resource. If you have the Pro Edition, you can also contact the support if you don't want to describe your problem in public. As the other people apparently have no problems to use files from a resource, I think you'll certainly get this working too.

You're aware however that not all engine functions can read from a resource? If that's the problem, read the manual description of the function you're using.