Apple you need to fix this

The app is pretty average. It would be fine except one thing. THE AUDIO MIXER. I have long videos I need to edit, which require multiple songs. So the problem is I cant choose when to cue the music it just automatically begins the song from the beginning of the movie without allowing me to move where the sing begins. I am extremely disappointed in Apple because I cant finish any of my projects using iMovie. Thanks a lot. Add a feature so we can choose what time the song starts

Darkwing2004 about iMovie, v2.2.3