A bit of advice to anyone wanting to base a post-apocalyptic around a couple of songs, similar to what Danny Boyle did with East Hastings (by Godspeed You Black Emperor!) for 28 Days Later in 2002:
Listen to both East Hastings and In The House, In A Heartbeat. Both are incredible instrumentals with mass amounts of raw energy and emotion to simply put the listener in a specific state of mind. Both come from the movie, and both are definitely worth the entire listen-through.