Gmail actually blocks it from from being sent, even if it is zipped. I had this problem with gmail before when I was trying to send the Germans SO episodes to wcnews to host. I can send it to you be hosted here if you can PM me a none gmail address.
Try changing the file extension to something other than .zip.
Yes, iirc there's a Ferret in those missions... I'm pretty sure they are available somewhere in the CIC's file section...
You can find lots of custom missions in the old missions section.
Also Chartbuster #16 had an unofficial addon of 48 mission for Wing Commander. Did anyone ever get this to work? If so HOW???
Among other thing it included a save game editor. I believe I sent it to you with the other files I sent you, delMar.
Anything more you can tell us about this? Is Chartbuster an old videogame magazine? I couldn't find any trace of it. The file naming system does suggest Academy. With other custom Academy missions, people typically just replaced a single mission.