No, you would not be able to forward the invitation to guests.
When you forward the invitation email what happens is you give someone else your invite. Each email we send contains a unique link which allows us to track RSVPs, Message Board posts etc. When you forward the email, you give your unique invitation to another person and when they RSVP, their reply will be under your name instead of their name.
You'll want to add in each of your guests from the Add Guest page and send them their own invite.