I do this in an extremely simple manner. I have tried more complex methods but they never work well. Just do your best with this simple method. Tape all four corners and start transfering. You can always fix any distortions before you cut the pumpkin.
When I am not carving pumpkins, I run the world's most private drugstore. ShopInPrivate.com
Also, last year, my company took over RomanticGifts.com, so if you need a romantic gift for Christmas, a birthday or an anniversary, please consider our wonderful store.
My co-workers and I run the biggest store for bachelorette party items in the world. It is lots of fun. We have fun jobs.