I've got both Confetti Cakes and the Whimsical Bakehouse.
Confetti Cakes doesn't have topsy turvey instructions. Its more toward shaping/carving, ie: purses, fondant/gumpaste molding, and decorated cookies..
The Whimsical Bakehouse has one article on making a tilted cake but instead of carving or dowling, they use extra thick dams and filling to build up one side of the cake higher. Its a neat idea for a single cake torted into 3 thin layers, but not so good if you wish to stack another tier on top..
All that extra icing and filling would surely squish out eventually from the added weight of another tier..
Heres another site with topsy turvy info. This one involves lots of dowling.. Click on the little photo, then enlarge the small cake photo that should come up.. If it works right, (it took me a couple of trys) it'll show you the placement of the dowels..Board Message
And here's one of the first set of instuctions for tilted cakes that came out.. This made the rounds on all the cake deco boards in no time!TILTED CAKES INSTRUCTIONS