If you don't mind the order your car stereo plays the tracks in, you can try taking out the '001', '002', etc. at the start of the file names. Most CD MP3 players will play the tracks in alphabetical order if the file names do not start with a number.
Another thing worth trying is putting ID3 tags on your MP3 tracks. If your car stereo supports these and you tag the songs with the artist & song titles, the display should show the artist followed by the title. My previous car which had an MP3 radio didn't show the filename at all when the songs were tagged.