I think what's going on is he downloaded a free beat from the web and wants to extend one of the verses on the beat. Being that he didn't make the beat, the best options I see is either A.) Ask the person or company that made the beat to extend it for you. B.) Extend the beat by chopping out the segment that you want using something like Cubase, Sonar, Acid...etc. and then looping that (adding the part that was on the end further back of course). That's going to take some effort.