One of my best friends did fantastic impressions of them among many others, he made this "I got 5 on it remix remix" (which was based off the rappers Luniz, E40 and Dru Down) for 106.1 KMEL in San Francisco back in 1995. He was on a few radio stations and did stand up comedy as well, he was mainly known as being the Asian E40. He had a very low tech setup and took turns doing one voice over the music and then recording the second on top of it etc...