Sewing Wedding

I want to sew a Dress like Giselles wedding dress from the movie Enchanted?

Any ideas on which sewing patterns would be similar, or ideas for the details?
Im making it for a little girl, size 6or 7

Here is the cosplay community for the movie, they can help.

http://community.livejournal.com/enchanted_csply

A Thread Wedding – Sewing Machine Threading Tip