The other thing is, the attachments might be limited to the Forum Software. Arcana is the Forum Owner, so he would know more, but if the makers of the software sat back and said: Lets Allow GIF, BMP, PNG, JPEG, WORD, ZIP and PDF (and maybe a few other types, who knows) as valid attachments, then they did. But, if the provision for this type of attachment is not allowed, then like others have said, you'll have to fall back on the ol' ZIP and post em that way.