Hey Guys... Its Me D00per.. Soz My Account Froze...
Um Halo 3 If I Match Make On Certain Games It Says:

One Or More Players Don't Have The Maps Required To Play This Game

2 Questions In 1! :)

1. What Does This Actually Mean? :confused:
2. What Can I Do To Actuall Do 2 Play These Matches...

Cheers,
Phyco

1.it means they don't have the map pack i.e haven't downloaded them yet so they can't play in that particular game.

2.download the map packs via xbox live, check they might be free by now if not I think they're only like a £10