How do I make clips longer on Windows Movie Maker?

I'm working on a slide show using Windows Movie Maker. The only way I know how to make a clip longer, is in the time line, drag the clip to the desired length. But I want ALL my clips to be longer than 5 seconds. Is there any way I can set that all the clips will be a certain length? TIA
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That's the way the cookie crumbles...

I always set them one by one. This way you can make it (almost) exactly how you want to fit the music. But please post if you find out how to preset it for a longer time!
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"Often the things you worry about don't happen but other stuff does."
- Amother

Here's what I found, though too late for me:

Cool. 8)