Just a quick follow up to this. I had the same issue.
The game is playable without the extra downloads but causes issues relating to the following post:
I believe this might have something to do with the download site http://www.ultimapsobb.com/psobb/v1/update/files.txt
Just have to manually connect to the download site, select "proceed to the site," and retry the download. This fixed the download failure and also fixed the naming conventions.