If you put one song into another game...

would you be able to throw one song from one game into another by incorperating it on the cue sheet? would it have to be the same amount of time as the original?
Some games require the audio tracks to be a specific lenght.

Most, I believe, do not.

Try it and see.
well, you could always experment with gens and its iso/mp3 support for mega cd games, since you can change the order of the tracks without needing to reburn that way as well