Yep, if you have Poser 6 (not sure about Poser 7), you can use the Morphing Fantasy Dress in the cloth room and clothify the skirt portion.  See this thread for more.  At the time I had Poser 5 and was struggling to do the same thing in it, but found out it wasn't possible. So if you have Poser 5, it won't work.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2517340&page=1

 

Here is a gorgeous wedding dress.  I have it but haven't tried it in the cloth room as yet. It has some morphs, but not a great deal so posing is limited for the skirt.  The Train is a separate part that fits at the waist/hip, so it should be possible to work with in the cloth room too.

http://market.renderosity.com/mod/bcs/index.php?ViewProduct=30468&vendor=25042

If you like I can try running a simulation with the dress and see how the skirt looks. I have been meaning to do it one day anyway.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi