Visual Studio 2005 Beta 1 Installation -- Round 1

Finally got the bits for Beta 1 of VS.NET 2005, and about 20 minutes into the install I get the following error:

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Visual Studio 2005 Beta Setup
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Error 1311.Source file not found: z:\vs\_13245_NETCF2_Debugger.msm.cab.  Verify that the file exists and that you can access it.
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Retry   Cancel  
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I have a feeling it has more to do with the ISO mounting software I use rather than the VS.NET setup program, however I was trying to avoid having to unpack the enormous 3.5 gig ISO image.  So, looks like I get to go that route regardless.  Updates as they present themselves...