I was only joking when I thought there would be problems with the Stimulus Package for MW2 soon after release. We hate to be the bearer of bad news, but it appears as if the Map Pack is unplayable for all Xbox 360 owners.
As Nowgamer points out, the download is now available, but players are not able to play the new maps either public or private. From what we gather, this is due to a separate title update to the game, which is meant to sync everything up correctly. All is explained in detail at Robert Bowling’s blog here.
As you probably realise, the Stimulus Package download is now available on the Marketplace, but the in-game patch is not, meaning that you’ll still have to wait to play – even if you have downloaded the content already.
Hopefully it won’t be too long before everything is running smoothly. Don’t do anything drastic for the time being, deep breaths everyone.
We’ll update you when its all sorted.