Ive looked for it everywhere and cant find it. I think it was a picture of a billboard for the vaults. It was torn and damaged. And im pretty sure it had the vault boy on it. I think it was posted here before. If anyone can find it and post a link it will be greatly appreciated.

http://media.photobucket.com/image/Vault-Tec%20Poster/visualcrack_photos/fallout3poster.jpg

is this what your looking for?

No, it was wider than that. Thats similar though. Thanks for looking.