Memoir '44 Overlord module

I apologize if this has already been answered. I checked everywhere online but could not find the answer to my question:

I’m trying to add Memoir '44 Overlord scenarios into Vassal, but have not been successful. I currently only have access to the basic scenarios, and nothing shows up when I filter Overlord scenarios. Is there a specific module that I need to upload, or any particular trick in obtaining Overlord maps?

Thanks in advance,

Bob Gibson