Dr. Nikolai Demichev from Singularity by Raven Software. XPS model by ArmachamCorp, conversion to SA by Feisal AR.

You can replace any pedestrian with this skin.

Installation
1. Use IMG Tools (or others) to open "gta3.img"
2. Search "wmyst.dff" and "wmyst.txd"
3. Replace with the one in downloaded archive
4. Rebuild archive

Optional
This mod includes normal map, which adds depth, shading, and better lighting effects to the textures.
If you want to enable this feature, you need Normal Map ASI plugin which you can get here:

http://hotmist.ddo.jp/plugin/normalmap/index.html

Extract all plugin files to your GTA San Andreas folder.

For more mods check out : http://feisalmods.blogspot.com
Cheers.