Selective NT logons via batch/scheduler

Is there a way using either WinNT4 or 2k to schedule automatic logons/logoffs of different users? Ex: Can I have the machine login on Monday @ 8am as User1 and have the machine autologout User1 on Friday @ 5pm and have User2 autologin @ 5:10pm on Friday? I know about the WINNT AT command, but need some assistance with the loging in/out of different people via batch or schedule. Any help would be great!