There are a number of ways to do this if they are too big for email account limits. The best way, IMO, is to set up a temp FTP server with something like
Serv-U, and then tell your friend to use either an FTP client or even just a browser to get the files.
There are other ways, as well. there was recent thread on this with heaps of ideas in - I'll see if I can find it.
Cheers
Mick