Styles.. There is a way you can do that..
Simply add a clean loop on one of your flash points.
Then when you have a good loop stored simply hit the memory button, and hit that same flash point again on beat of the song so that it's on the same count. If you do this right it will sound like a clean flange.
Then what you want to do is just hit the stop button
Your stored loop will play, and then you can switch to another track on the CD while that is playing , and then you can scratch a song into that loop, and once you did that then you will need to shut the loop off by hiting memory again.
Try it out, and see if it works for you.