Level 6 Volcano -Boxes! what do i do with the boxes

[Guest warblade]

In level 6 palawan volcano, I used Urgon's part to smash a wall. behind the wall are some boxes , and i dont know how to open the last box that has the part i need. can anyone please help me?

[Guest Marion]

This puzzle gave me a little trouble too. you must push and pull the other boxes from the opposite end of the box your trying to open, until you can get in front of it. Can't remember for sure what order. Just keep moving them.