Modding old maps aren't the same as modding new maps. To mod old maps you would have to hotswap or have a mod chip.. Or you could just convert a new map so you could play it as an old map, but you wouldn't be able to play that new map until you took the mod off -.-
Wow, i just made a thread with the exact same video. You need to make the topic name what the video actually is, -Modern Warefare 2 multiplayer gameplay-