Hi,
Here are a couple of party dresses. They use the Skirt Lappets mesh (by Chriko) which can be found at http://www.2-f0r-u.de/startsims2.htm - on the left hand menu, click on fashion (under meshes) then click on Female. The mesh "Skirt Lappets" can be found on page 2. Piccies below, any problems please shout.
 

I love this mesh (thankyou Marvine) so I thought I'd have a go at making a new outfit using it for my first upload. The necklace is part of the outfit as it was looking a little bare around the neckline. Mesh can be found HERE. Also a big thanks to beosboyboy for his female muscle shadowing overlay.
 

 
(The sim modelling the dress is a daughter of Loki from Strangetown and the wallpaper is my own. The skintones might be Zerpentor's but not sure as my skins subdir needs sorting at the moment.)