Halo 3 mongoose mowdown, Lee R wilson Memorial, Overkill, Maybe Next time Buddy,

[Hells Ninja]

2 for 1 achievements help? i need help getting the mongoose mowdown, we're in for some chop (what level in the campaign would it be best to get this achievement. Details Please), Lee R wilson Memorial, Overkill, Maybe Next time Buddy, and the two for one achievements. im trying to get all the old achievements to get the katana sword on my friends xbox 360(which isn't connected to the internet) that way when i get my 360 which should be sometime this May, i can recover my account and ill have all of the Achievements i earned on his 360. By the way do i need to hook his 360 up to live so that my achievements will update online at xbox.com. that way i will have all the achievements i had earned before.
Thank you all for your Help.
Im a Lieutenant Grade 2. My gamertag is InfernalSASUKE. So send me a friend request.