How would I go about doing this?

[SocceRich20]

Ok, theres this kid in my school, whos really annoyying, and the joke around is singing stacy's mom, except taking out stacy and putting in "Carby." I want to edit this song so that it says Carby's mom, instead of Stacy's Mom. How could I do this?

[jkrohn]

Well the first thing you would need is a sound bite (or bites) of the "Carby"'s that you want to inset into the song.

Once you had those you could simply export the mp3 to a wav, and use a wav editor to put them in the right place.

Getting it to sound half decent is harder than it sounds though.
More expensive audio editing programs would make this slightly easier, but most people don't have them and they aren't cheap by any means.

Jkrohn