in the track view there is an icon that looks like a magnifying glass, and that is the "loop explorer", it will open a popup window where you can navigate to point to your CD ROm or wherever you have loops stored. In that window you can preview sounds, and drag and drop loops to whichever track you have selected in the track view. You can then move the loops around depending on the resolution you have selected in the snap-to-grid feature, and just drag at the ends of the loop clip to repeat it as many times as you like. The loops will play at the tempo set in your tempo meter