Took me a while till I figured out where is the mod in the TDWUI pack. Moded with winmerge the .ini file where I changed only the colors and replaced the dds files with the black skin. I see no css files in TDW pack, so I supose the .ini is able to support the color changes all alone.
I cannot test it right now,
here is the link with the whole mod.. install with JSGME and try it out. If it works oke, write back and I may put a permanent link to this version.