Error while installing .NET Framework 3.5 Beta 1

It seems that on Windows XP SP2, if you already have .NET Framework 3.0 installed, you will get an error while trying to install the pre-release .NET 3.5 beta 1.

The installed will complain about dependencies, one of such is:

Microsoft .NET Framework 3.0SP1 WCF

You will not find this to download anywhere!

The fix!
Uninstall .NET Framework 3.0, then start the 3.5 installation process. The 3.5 installer will grab the bits of 3.0 that it needs. This will fail again BUT it will have installed the necessary prerequisites. You'll get similar DepCheck errors again.

Then, install the: Visual Studio 2005 extensions for .NET Framework 3.0 (Windows Workflow Foundation)

Now, start the 3.5 installation one more time. This time it should complete.
Restart the PC and you're done.

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