when I start singing in the Garageband file isnt when I start singing in the iMovie video
You can move the "voiceover" audio track back and forth in iMovie. You can also trim bits off the start and end.
When you import from GarageBand, instead of dropping the track onto iMovie's background area, drop it onto a frame of video. The track will then appear as a ribbon (narrow bar) below the video thumbnails. This ribbon can be moved (by clicking and dragging) and edited. One way to edit is to use the Clip Trimmer. Click on the small gear icon at the start of the track and select "Clip Trimmer" - a window will open showing the audio waveforms. As you skim over the waveforms (or drag the ends) you will see the corresponding video move in the Viewer.
With a bit of playing around, you should be able to line things up nicely.
Oops, just noticed you are in iMovie '08 - not sure if the Clip Trimmer was included in that version. In any event, you can still trim the ends by dragging them in the main Projects window.
John
Message was edited by: John Cogdell - added Oops