Currently Being ModeratedDec 5, 2012 10:24 AM (in response to Gonzrath)
See this section of iMovie Help. Click on the one about "To set how transitions overlap with adjacent clips."
You will want to set Transition Overlap to Half, if I understand your question.
Currently Being ModeratedDec 5, 2012 1:13 PM (in response to AppleMan1958)
That sounds like it might work, but I'm using iMovie 09 and the overlap menu does not appear in 09.