As I reported a week ago, Vlite is a program that can strip away all that stuff in Vista that you don't need. Microsoft says that they do not recommend it at all. Heh...

Microsoft does not recommend using any tool to strip out applications from Windows Vista prior to installing it on your system, as it may affect your ability to download future Windows updates and service packs, and may cause your system to become unstable," the company said in an e-mail to CNET News.com. The company didn't mention downgrading to XP or switching to a Mac, but I'm guessing Microsoft doesn't really want you doing those things either. Microsoft does have a project under way, as part of its Windows 7 development process, to create a slimmed-down Windows kernel. Microsoft has refused to offer further details on the MinWin effort, beyond comments made by a Microsoft engineer at a university lecture last year.