I have a 4 day park hopper pass from 2003 that me and my husband still had 2 days left on, we are going back and were told that they are still good to use the other two days. Is this correct? Please let me know thanks.

Yes, you may use the two extra days left on your park hopper tickets. In 2003, all Disney World tickets came with the non-expiration option already added to them.