you should do "save as" so its a different session, then consolidate each track (alt, shft,3 or something) to create new single audio files for each rack (instead of say...30 or so audio files for each track, this turns them into one single one...(oh and dont forget to apply crossfades and start consolidating from the begining for each track or it will be an absolute mess!).
now that you have consolidated the tracks, just go to the audio files folder of the session (or just export them to their own folder so its easier to find them) and choose the files to send via the internet.
The session file itself contains very little data compared to the .wav files, you could even use itunes to convert these new files to .mp3, and that will greatly reduce the file size.
Pando.com is an easy way (sort of) to send 2 gigabytes directly to a friend.