One person will need a sniper (preferably a Barret) and the other will need a MK46. Also both players will need a riot shield squad.

Once you have all the stuff above, go towards the grenade laptop, and try and get the riot shield men to go to the street while your team mate jumps on the van and snipes oncoming enemies on the street.

If you want you can buy claymores and plant them on the street. As for the other person, he can guard the stairs.

That's it! How far can you get?