The XML for WPKG will look like this:
<code> <package
id="remotedesktop"
name="Remote Desktop"
revision="1"
reboot="false"
priority="0"
> <check type="registry" condition="equals" path="HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\fDenyTSConnections" value="0" /> <install cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f"' /> <upgrade cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f"' /> <remove cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 1 /f"' /> </package>
<check type="registry" condition="equals" path="HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\fDenyTSConnections" value="0" />
<install cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f"' />
<upgrade cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f"' />
<remove cmd='reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 1 /f"' />
</package>
</code>
This will allow you to log on as Administrator (either domain or local) using Terminal Sessions.