Like I said. I'm talking to Aleni right now. She took the pics from elsewhere, and the signatures were already removed.

Here are the adresses:

http://rc-mir.com/

http://www.artfile.ru/

http://www.gee.ru/

http://www.babene.ru/

http://www.mota.ru/

Aleni wasn't aware that the artwork has been stolen, and I gave her the adress of our forum so she can explain the whole situation by herself. The only problem is - her english is not that well. But she told me that from now on she will ask the author's permission. By the way - she didn't knew about Renderosity until this week, and the first time she saw  our galleries was three minutes ago, when I gave her the link.
Right now she tells me that the most of the pics she took at artfile.ru 
Regarding the already posted pictures - she says, the site administration can remove it everytime; we only need to tell them the number of every picture. That's it.