I just wanted to thank you for this. I've been trying to do some of theese but I keep messing them up. I hope you will consider doing more FitChick NPC's.
I've never seen anything like that. Are you sure it's not an accessory? You might try taking her to a mirror and making sure she doesn't have on a glasses type object,
You need to use skintones that are linked to the paticular mesh, ie.. bodybuilder or Miana. Showerproof skintones are linked to a paticular shape so you need to find ones that are made for the bodyshapes your using. The work clothes have always been a problem with bodyshapes.
For Christianlov'solder skintone changers you need to have the skintones that it calls for in your downloads folder. For the newest version you have to use his CLTool to scan your downloads folder to load all your skintones into it.
The problem with the older versions is locating all the skintones. I've had mixed results using the newer version. Sometimes it works for me sometimes it doesn't, but I know that the problem is something I did or didn't do.
When I extracted them they show up as "file", to get them to show up in game I had to rename them by adding ".package" after I did that they worked fine. You may have accidently zipped it up using a *.bak file.