I find the method!
My .Net is Visual Studio 10, And try to change the file of eula.rtf by:
C://Program Files/Microsoft SDKs/v7.0A/Bootstrapper/Packages/DotNetFX35SP1/(your local document like "zh-Hant" for me)
And my .Net framework is 3.5 SP1, so I change the files in DotNetFX35SP1.
My eula.rtf is Chinese original, so I try to change it to English(In DotNetFX4.0, there is several language of the eula.rtf file)
So I fix it!