Replace one portion of audio with another?
Trying to create a quick short movie using iMovie 11. The movie is a serene shot of a mountain stream, water bubbling over rocks. Just near the end my son goes crazy nuts and starts screaming like a banshee. I want to copy a previous section of audio and replace the screaming section with it. I could do this easily in previous version of iMovie by highlight the new audio section, hit copy, go to the section I want replaced, highlight that section and delete then hit paste to copy in the new audio section.
iMovie 11 is different. I find that doesn't work. How is it done?
Mac Pro, OS X Mountain Lion (10.8.2)