I threw these together from pictures of cartridges and console logos. What do you think?
TO INSTALL: Save the archive to your home folder and extract it there. This will place the icons in ~/.kde/share/icons. (Then just set the icon for each filetype, of course.)
I'm probably going to replace the current ROM icons in "my" Dark-Glass_MOD theme - http://www.kde-look.org/content/show.php/Dark-Glass_MOD?content=78242 - with these in a future release. Please let me know if you like the other ones better so I can consider your opinion when deciding.