unfortunately you can't post it as an attachment, the bandwidth of attachments are small, and well you have a rather large file! Let me find out if you can do it alternative way, with a zipped folder.
EDIT: Cannot post it as an attachment, you can upload it to a file uploader and post a link to that file. google, something like file uploader and you should upload the folder onto their bandwidth and then be able to pass the link around for others to download.
EDIT2:
Free File Hosting Made Simple - MediaFire try that site
