Invitations - How to stuff the envelope

I made my own invites. I have the invitation, Map and Reply card and envelope. What order does it go in. There's no inner envelope. Also, how does the reply card and envelope go, reply card inside the envelope or just put the envelope flap over the card?

HELP! I want to send them out on Monday.

YES! Karen and Sharon, BEST OF LUCK!!! We're all very excited for you!!!