Start by pushingth boxes down a ledge, but keep them together, shoot a portal above the button. now shoot another portal right underneath the boxes so that they all go through and land on top of eachother. Jump into the the area between the boxes and push the 2 boxes until you knock over the turret. Take the top box off of the 3 so that you have two and push until you knock over the other turret Then stack 2 boxes so you can jump back onto the ledge, shoot a portal towhere th enrgy ball is, jump onto the ledge, shoot a portal underneath he recieving end of the energy ball. go through the portal so you are now at the area with the energy ball shoot a portal so that the ball goes through the hole and reaches the receiver. now, from that point on it pretty self explanatory as all you do is get the boxes on the buttons, any more trouble just ask.
