From a MS post:
Upgrade Windows 2000 Group policy to Windows XP per:
Q307900 Upgrading Windows 2000 Group Policy for Windows XP
http://support.microsoft.com/support/kb/articles/q307/9/00.asp
Then enable one or more of the following policies:
Computer Configuration\Administrative Templates\System\Remote
Assistance:
Solicited Remote Assistance or Offer Remote Assistance
Then to actually force RDP to be enabled on a Windows XP Professional
Machine
(Disabled by default) you must set the following policy to "DISABLED"
Computer Configuration\Administrative Templates\Windows
Components\Terminal
Services\Do Not Allow New Client Connections.
Set this to "Disabled" and run GPUPDATE on the XP client. You can
verify
that
it has been enabled by right clicking on "My computer" and choosing
properties, clicking on the Remote Tab and checking that the "Allow
users to
connect remotely to this computer" is greyed out and checked.
Jeffrey Randow (Windows Net. & Smart Display MVP)
(e-mail address removed)
Please post all responses to the newsgroups for the benefit
of all USENET users. Messages sent via email may or may not
be answered depending on time availability....
Remote Networking Technology Support Site -
http://www.remotenetworktechnology.com
Windows XP Expert Zone -
http://www.microsoft.com/windowsxp/expertzone