Where can I find the .NET bootstrapper files?

I have created a setup project with VS2008 for a .NET Windows Forms application using .NET Framework 3.5.

But I want to create an installation with WiX 3.5. Since I have VS2008 installed, I expected I can use the instructions in the help section How To: Install the .NET Framework Using a Bootstrapper. Unfortunately this includes a reference to the directory

C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bootstrapper\

that I cannot find on my PC although this should be present if VS2008 is installed. Should I find it somewhere on my PC or do I have to install this manually? Why should this be necessary?

What are other opportunities to开发者_C百科 automatically install the .NET framework when required?

Edit: The WiX documentation describes the path for VS2005 on a 32 bit operating system. I found the boostrapper at

C:\Program Files (x86)\Microsoft SDKs\Windows\v6.0A\Bootstrapper

There are a few related questions to yours, check out WiX: Where can I download the bootstrapper?