Okay, so we know that despite all indications, CSEs are not included in the OS install via Windows Vista Service Pack 2 OS installation disks.
Apparently the Client Side Extensions for Windows Vista Service Pack 2 slipstreamed media will be released sometime later this month or early next month.
So, make sure that any fresh OS install using Windows Vista SP2 media that needs Group Policy Preferences applied gets the above “hack” to enable GP Preferences to function as expected.
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book