Rubik's cube help with the cross?

Okay, Hold the cube so that the offending sides and the cross itself are facing you (as pictured in the page you linked to). Take the left offending side and give it a 180 degree turn, so that what was previously part of the cross is now on the bottom. Turn the bottom layer 90 degrees to the right so that this square is on the bottom of the right offending side. Now take the right offending side and turn it 180 degrees, turn the bottom layer 90 degrees to the left, and turn the left offending side 180 degrees. All fixed up!