While PSI: Syberian Conflict was being developed, a lot of ideas were had, and not everything made it to the final versions. Luckily, some of the files survived deletion and plenty of pre-release screenshots can be found online. This mini-mod (addon) is meant to "restore" as much as possible by editing scripts for levels, units and using existing meshes with their animations and textures. It may be used as a base for mods. Does not affect normal gameplay.
Just an optional replacement for those, who play in Russian. Overwrite the 'texture' folder, or just the 'high' folder that is inside it, if you don't...