Wow, this looks amazing! Looking forward to running this!
On the website hosting this, I (using AltaVista) translated the description out of interest, it only served to fascinate me more. 
For the English speakers here, here is the translation. It's a little hard to read, though you can understand it: 
 Into the second version enters 43 kilometer section of  Abkhazian railroad from the Russian- Abkhazian boundary along Psou  river to the input pointers of the station Of mysra (o.p. To psou -  o.p. You gyach'rypsh' - st. you tsandrypsh' - o.p. cold creek - st.  you chigrypsh' - o.p. Of abaata - o.p. You gagrypsh' - o.p. Of  adzkhyda - st. of gagra - o.p. Of pitsunda - st. of bzybta - o.p.  crushed stone plant - o.p. Of kaltakhuara), and also 10 kilometer  Russian section of North-Caucasian railroad from the boundary to the  input pointers of the southern neck of station Adler (boundary - st.  merry - st. Adler).
Route is built on the basis of real relief with the use of  materials of videos"emki of route from the operator's cab of electric  train Adler - Sukhum (2004), and also the materials of photography  2005-2006. All buildings of stations are modelled on the  photographs specially for this route. Despite the tendency to  make as it is nearer as possible to the reality, there was made  intentional retreat from the reality - on the route entire signaling  and automatic block system (in the reality Abkhazian road thus far it  is in the neglected state and not one light signal there at the given  moment it works) completely works.
In the third version, whose output is planned in yr, route will be continued to the side Of sukhuma. 
Another notch for prototypical routes, it seems!
Apparently this is for TRS06 SP1, the listing on the site seems to include all custom content needed!
I'll be trying this as soon as it's downloaded, thanks!