May I make a few suggestions? I have observed that many of the people who are using the internet for Greek family history research are doing it in English, from the USA, Canada and Australia. We have a number of active Facebook groups including one for gravesites that just started. You could try there.
Also, you could try and find a photographer who appears to be in the same area and takes alot of photos and posts them freely on Flickr and Panorama. If you approach them directly, they may be willing to take a photo when they are next in the area. For example there is a photo of the cemetery you are interested in at: http://www.greece.com/photos/destinations/Macedonia/Thessalo...
It was taken by this fellow: http://www.panoramio.com/user/3633435?comment_page=1&pho...
Just a thought. Photographers wander and love to capture images. He might be quite happy to help. I don't know if there are others out there, that was just my first search. I used these search terms: στρατιωτικό νεκροταφείο Θεσσαλονικη