Pyro Software has released PyroDVD, a small DVD player.
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Runs on WinXP and should run on 2k . It's free and fast and uses less system resources then Windows Media player or PowerDVD.Homepage
Needs DX 8.1 and VB6 runtimes. If it complains about mswebdvd.dll you can get it at www.pyrosoftware.net
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