Audio / Computer wizs....I need some help with CD ISO's

I have some complete albums obtained from a computer I parted out. They are cd images in .ape format. Nero doesn't recognize them. I can can convert them using a program I downloaded for free, but all that does is turn them into 1 large MP3 file. I have no idea how to extract them and see each individual track. If I could extract all the tracks I could convert them. I'm stumped on this one. Anyone??? 
