Here's the code I use to register KixGUI. I have included and install for the VB5 runtime just in case my Win 9x users don't have it installed yet:

code:
$root=createobject("KiXGUI.Desktop")
if len($root)=0
	if @inwin = "1"
		shell "%COMSPEC% /c Regsvr32 /s %WINDIR%\KiXGUI.dll"
	else
		shell "%COMSPEC% /c %WINDIR%\System\Regsvr32 /s %WINDIR%\KiXGUI.dll"
	endif
	
	$root=createobject("KixGUI.Desktop")
	if len($root)=0
		$GUI=ReadValue("HKEY_CURRENT_USER\Relizon","GUI")
		if $GUI<>0
			$Selection=MessageBox("This logon script supports a graphical user interface, however you do not have the needed files."+@CRLF+@CRLF+"Click YES to install the files, NO to choose to NEVER run the files, CANCEL to install the files later.","Relizon Logon Script",3,30)
			SetConsole("Show")
			cls ?
			if $Selection = 6
				$msvbvm50=@SCRIPTDIR+"\msvbvm50.exe"
				? "Installing the needed files...please wait"
				shell "$msvbvm50 /s"
				?? "Files installed...thank you" ?
				?? "Graphical Logon will be seen during your next logon." ?
				sleep 2
			endif
			if $Selection = 7
				if KEYEXIST("HKEY_CURRENT_USER\Relizon")=0
					ADDKEY("HKEY_CURRENT_USER\Relizon")
				endif
				WriteValue("HKEY_CURRENT_USER\Relizon","GUI","0","REG_SZ")
			endif
		endif
	endif
endif