You can't send it as an attachment. Most ISPs impose a limit on the size of
a single file, and the recipient may not have an email with enough storage
space to receive it (most are limited to 100MB). Your best bet is to either
upload it to a sharing site (a paid service; usually no porn and no
copyrighted materials allowed), or burn it onto a Dual layer DVD and send it
to your friend. If you are fairly adventurous, you could allow a Remote
Desktop connection and transfer using that, but 6GB is going to take a long,
long time (don't even think about it on a dial-up connection).
Bobby