I have 2 achievements left in Halo 3; Vidmaster: Annual, and Save this Film. Unfortunately, finding 3 other people to do the former is hard for me, and getting the perfection for the other is also hard. I can keep trying to get the perfection, but I need some help for Annual. Are there 3 people willing to help me out here? If you can, message me, my GT is Aniki120.
For Annual, you can have one guest, but you still need to drive it. As for finding other people, here is a link to a group who help people do some of those achievements.