.NET Framework is not included with the default install of WinXP. You'll have to download it separately, it also comes with Windows Update. Just an FYI, Microsoft released .NET Framework 2.0 recently, you can download it as a standalone install.
But more to the point, I recommend that you just get the control panels version of the drivers. I don't use the CCC as it's slow and bloated. I don't use any of the deeper settings that the CCC provides access to so it's of no use to me anyways. And the control panels version is a smaller download so it's a win-win any way you look at it.