I have to do an oral history project for school, and i did mine on an audio cassette using a recorder. When we turn in the cassete we are never getting it back. I have a stereo system that has a cassete deck that could fit two cassettes, it also has a record button. so i know i can copy it do another cassete, but i dont know how? Does anyone know how to do this, i really cant manage to mess up the original cassete because a huge grade is riding on it.