Rename Attachment Before Send

Hello!
Sorry for the cross-post from netscape.public.mozilla.mail-news.  I 
think I was in the wrong newsgroup.

Is there a way to rename an attachment before sending it from Mozilla's 
email client?  I typically use the windows context menu "WinZip"->"Zip & 
Email" to send attachments to people.  The problem is that lately the 
mail server won't allow zip files to pass through and IT won't undo that 
for security reasons.  I can zip the file, rename it and then send it 
but that is just annoying after a while.  WinZip says they won't provide 
a way to zip the files with another extension so having Mozilla do it is 
my other choice.  Any ideas?  If nothing right off hand then can it be 
done with XUL if I were to try to learn it?

Thanks!
Matthew Hanna