Thank you Fatman117!...the russian web site we are talking about is:
http://www.1zoom.ru
In this site we can find many images taken from Renderosity and most of them are posted by Aleni.
There is also an admin e-mail adress, but I think we can try before to contact this "Aleni".

If you check the 3d section you'll recognised many images from Antje, RGUS,  and many others...
And most of all those by Rainfather the signature has been cutted off...this is a clear violation of copyright...

Now:

1. nobody ask them and us permission to post our images in other web site
2. are they selling our images for cell phone "desktop"?

Could you write him that images taken from RR are just to be saved on HD for personal use and not posted in other site without author permission?!
and please tell him that ask cost nothing!...because take without asking in the west is called...you know!?
Now if he will keep our names and post them with our names and permission is ok, but if he posts them without our permission and he cut off signature....well this is a different subject...
Probably as Drifterlee explained us in Russia there is no copyright laws, but if this web site can be seen by west people...well he is violenting our laws...
Thanks a lot for your help!Aralt3