If you had used Windows Vista in the past, you are probably familiar with the tool vLite. vLite was a very useful tool for customizing and tweaking a Windows Vista installation. Unfortunately, once Windows 7 was released, an update was never released to support Windows 7.
However, fortunately, another team has taken up the task of offering a tool similar to vLite called RTSe7enLite. Even better news is that they offer a version for both Windows 7 as well as Windows Server 2008 R2. The tool for customizing the server operating system is called RT Server Customizer.
You can read more about these tools and download them from their website: