You said tihs is open even if you gave me 2 from the original post right? If so, I would take 2 more, if not that's cool too. I don't mean to prevent anyone else from trying.
Edit:
" The code you entered is now invalid as you have exceeded the number of entries you are allowed from the Pepsi email "Forward to a Friend" initiative. "
So, err, probably not worth bothering. Thanks anyway.