How do I do two colors of fondant on the same cake? I've got a friend who wants me to do something similar to this one:

http://inspiredbymichelleblog.com/wp-content/uploads/2010/06/confirmation-first-holy-communion-cake-inspired-by-michelle-cake-designs.jpg

I saw something that said I should cover the cake first in white, then cover in the green, but how would I get the joint to be straight then? Plus, they appear to be the same thickness, so that would shoot that theory.

I'm stumped and can't seem to find any answers.

It looks to me like the cake was covered in the pale green fondant and a white stip was simply wrapped over it at the bottom. The darker green 'snake' of fondant was used at the 'join' to soften the edge

Yep, green first then white on this cake. The snake of fondants is sitting on the lip of the white strip.

ditto

I'm agreeing with the rest of them. But is it that you want to copy the cake exactly? I try, but I never seem to manage an EXACT duplicate of anything. I'd be well on my way and then I'd start to play with the design and ...like I said, never an EXACT duplicate . What I'm saying is go! play! have fun with it!

If it is a strip, then how would you hide the seam in the back?

You can mesh the fondant together as well as you can with water at the seam. If you plan on copying the cake exactly, you can just cover it with a line of the silver balls or stars. Being that its at the back of the cake I wouldnt imagine its a big deal