OK, this Friday, the camp I'm working at has a talent show, and the counselors are required to perform. One of the kids and I will be performing our rendition of "Bye, Bye, Bye" by Nsync.

(Basically, I wanted to do something really goofy that the kids will find amusing and entertaining, rather than some lame talent.)
My problem arises due to the fact that I only need about half of the song since I doubt I could last handle the full four minutes. Is there any way I can burn half of the song, or do I need to truncate the file first? If so, how would I go about doing that? Basically, I have no idea what I'm doing and any help would be greatly appreciated.