Check the atarimania.com database first... chances are they are probably there.
Fancy car- silver cartidge with black letters (super 2600 cartridge and has a pac man in black)
River raid I - silver cartidge with black letters (super 2600 cartridge and has a pac man in black)
Skirunner (skiing) - front- 2 pictures and a wood simulating background- back- description of the game in spanish(not in the list)
corredor cosmico- super game cartridge(not in thr list)
sea monster- Dactar (not in the list)
pole position-edu juegos (has no cart scan)
demon attack- blue with picture of the game box and says imagic
laaser voley-picture of a pirate island
jungle hunt (Tarzan)- very cheep drawing in the front and says 50 hz
4 in 1- hero - pengo - beamrider- pitufo (has no cart scan)
I ll keep searching later, I have hundreds to check 1 by 1