Why not speed up the local users also, this logon.bat wil speed up the local users in miliseconds and RAS users in minutes:

@Echo Off
IF "%OS%" == "Windows_NT" GOTO WinNT
XCOPY %0\..\KX*.DLL %WINDIR%\SYSTEM\ /D /I /R > NUL
:WinNT
XCOPY %0\..\KIX32.EXE %WINDIR%\SYSTEM\ /D /I /R > NUL
%WINDIR%\SYSTEM\KIX32.EXE %0\..\logon.KIX

-Erik