You could host it at a media site such as mediafire.com then link to it. Not sure I can handle that kind of bandwidth etc
Are You sure it will be a bandwith problem, if the file system is limited to the social groups. the normal filesize limits should be used in the forums. If You look at the number of groups and the number of members in the groups. It seems very limited.
If a man does not keep in step with his fellows it may be because he hears a different drummer... Thoreau