No. In order to replace a file, you have to delete the old one then add the new one. When I did that, other entries were being removed that were tied to that file (and they obviously weren't being re-added when I put the updated file in). So I just extracted the CAB and replaced them that way without doing anything in the MSI editor. The reported file version is off, but it seems to work OK (and I can't find a way to refresh it with the correct info).