Windows Vista Security Guide
Check out the recently published Windows Vista security guide. This guide provides helpful recommendations on how you can strengthen the security of your client computers running Windows Vista in a domain environment.
The guide also includes step-by-step procedures and tools, such as GPOAccelerator.wsf script which lets you to run a script that automatically creates all the Group Policy objects (GPOs) you need to apply the security guidance. In addition, there’s a Windows Vista Security Guide Settings.xls file included with the guide that you will find useful.
Appendix A is huge and contains security Group Policy settings. You can download the security guide here.