Force "Daylight Savings Time" on via Group Policy, Registry via logon script, or program?

I think the time settings are stored in this registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation

Most definitely they are.  But their are a few changes made to the registry when modifying this setting.

I'm hoping either someone has a ADM file for Group Policy, a registry file that I can push via our logon script, or a simple program that can be run via logon script.

you could set permissions so that the users can't change the registry key.

also, can't you just export the registry key, then have it restored using the login script?

Yes, but the changes seem to be a little different under Windows XP vs. Windows 2000.  Plus, it appears to be more than one entry and I have little experience with that.  I'll do it as a last resort, but what I was hoping for here is an easier solution...

I think that this script can be used, not only to check the timezone, but also set the timezone:

http://www.paulsadowski.com/WSH/tz.htm

Here are the different TimezoneID's

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cdosys/html/_cdosys_cdotimezoneid_enum.asp

Thanks Gemarti, but I'm trying to set the Daylight Savings Time option to On.  The script you pointed out only allows for setting of the Timezone, unfortunately.

Why would you push "Automatically adjust clock for daylight savings changes" ?
XP and 2000 use NTP (Network Time Protocol). In a domain structure it's on by default. In a workgroup environment it has to be configured. Clients get the time from a central server. This is the only point where you have to adjust the time (eventually).

A lot of info (including how to adjust things with GPO's is in:
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/xpmanaged/27_xpwts.mspx 

Get this.  I work for a Law Firm where Attorney's court calendars are kept in Outlook.  Some users (God knows why) decide to shut off the setting for DST.  Suddenly, there's a very upset Attorney who's late/early to a Court appearance.

Thus, I'm trying to force the setting to all users.

I'll take a look at the link you provided.  Thank-you.

You can use regmon.exe to verify:

Monitoring and Troubleshooting the Registry
http://www.windowsitlibrary.com/Content/313/1.html

Abstract
In this chapter, the author explores tools and techniques for troubleshooting Registry problems. He also discusses the best way to recover the Registry when you encounter problems and concludes with a set of common problems and solutions to use as a starting point for troubleshooting the Registry.