I added the rest of the gores to the petticoat. Two to the front and two bigger to the back. I didn't sew the two gores together first but I sewed them separately to the dress instead. This way I can see if the gores fit well and in case of need I can easily work with them using the middle seam.
I put too small gores to the sides, next time I'd use one small gore to the front, and the other three big.
And I must say that I found a very interesting tool today. I don't have to look for inspiration for a long time anymore, it comes to me:) Just check this Google Reader thing at Sharon's post.