On first look, Westhill is very close to Blackwood in terms of the textures used. There aren't many Westhill textures in the dds folder, atleast one or 2 are also Blackwood textures. I haven't seriously checked it all out yet. But as soon as I got S2 I imagined doing a Westhill update.
Southcity. Now that's a scary proposistion, as Honey points out. Plus I already think it looks really good. Definately on the 'last to do' list..
RE: messy dds folders- you should see mine! A quick analysis of the contents of my folder may reveal...
Textures
Recipes
Secret government documents
Hilarious anecdotes from the 17th Century
Blueprints for a time travel device
Online banking reciepts
Poems
Porno
Minesweeper
Plant care advice
Sentimental stuff
Cobwebs