Thank you and yes, it works anywhere. Just make sure you check the terrain in the F10 map before.
I think only Gelendzhik and Novorossiysk are missing navaids.
I've made this approach chart for Mozdok RW08 for RSBN and PRMG use in the MiG-21. It's incomplete and ugly but at least it explains a possible procedure and makes it understandable for someone who's never done anything like this before.
https://docs.google.com/file/d/0B9CtArHAgeXEY1cxejh1c2M0Q28/edit?usp=docslist_api
(I'm at a hotel right now, so I wasn't really able to upload the image in a proper way so I hope you can see it.)
The terrain in the near vicinity of Mozdok is also very flat but at other places with inconvenient winds, altitude discipline would be more critical. Maybe strong northeasterly winds in Nalchik forcing you to approach from the mountains.