Is it ok for the attachment to cointain what it looks to be an original WORLD.DAT asset? Perhaps replacing it with a dummy WORLD.DAT would be better and let the user copy over the one in their installation.
This is what Volutar distributed in his original release, the archive has not been changed in any way.
I don't think it's an issue, since it's not a resource per se, but I'm not really a person to ask.
EDIT: Added a link to Volutar's original page.