The codes work great for least portals and the advanced maps, but I just can't seem do well at least steps. Every time I go through a portal, it's two more steps! What am I doing wrong? They help some with least time, though. Mixed results there (chamber 13 seems impossible to me...can't get better than 39 seconds).
Someone up there asked what deactivate the colored buttons (or something like that) meant. It means you should go to controller options and remove A=jump, B=crouch, and X=use. Just play with Lb, Rb, and Ls so that you aren't jumping and crouching as you input the codes. This increases your cube creating accuracy by quite a bit, though using the shoulder buttons to play can take some getting used to.