With my old wire-bead tires, installing was a breeze, since the tire stayed pretty much round. Now that I have a new pair of (Vittoria Adventure Trail) folding bead tires, I'm going nuts, trying to get rid of the "ripples" and the "bobbles"

Is there a correct procedure for properly adjusting and seating a folding bead tire so that the tread is straight rather than snake-like, and the rim-to-tread height is consistent around the whole tire? I am surely doing it wrong...