I just tried to find more about the html page containing 
those images and finally I could download some files. The 
new (working) filters are:
-*/znacomstva* -*/afisha* -*/metafiz* -*/forum* -*/library*
-*/psihologi*
-*/foto/oboi*
+*/foto/oboi/download.html*
+*/foto/oboi/nature/cities*
+*espot.ru/img.asp*

The key is on the last line... ;-)

However I still have a problem that HTTrack generate 
completly useles names like "img2de8.htm" instead of a 
more meaningfull (the file is generated from 
link ".../img.asp?idtheme=nature&sub=forests&id=963")

Is there some solution?
Thank you very much,
Cosmin