The Windows Automated Installation Kit (WAIK) is an advanced tool that can create a custom Windows 7 set-up disc with your own settings, device drivers and other tweaks.
If you're looking after several Windows 7 PCs then this can save a great deal of time, as every time you reinstall Windows 7 it'll have the default settings and files you need ready and waiting.
[3]
Links:
[1] http://pulse.veltsos.com/category/it/software/software/os/microsoft
[2] http://pulse.veltsos.com/category/it/tweaks
[3] http://linux.philosweb.com/drupal/files/image_2_121.png
[4] http://www.microsoft.com/downloads/details.aspx?familyid=696DD665-9F76-4177-A811-39C26D3B3B34&displaylang=en