Hello,
Not a problem once you know the little trick....You press in on the sides of the box at the seam at about 25% of the way from each corner. That releases the plastic "catch" that is holding the box together....I'll draw it as a top view, using asterisks to show where you press...

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I hope that helps....Randy
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Happy owner of 2 Centrals, 2 Empegs Mk2a 160GB, 1 Empeg Mk2a 60 GB, a Rio Riot, 4 Rio Receivers, and two 1GB iPod Shuffles...