supra98twinturbo

I am new to customizing the windows login screen. I am running win xp pro x32 and xp pro x64 corp on another rig and I wanted to know if I need a program like windowsblinds. Is there a way to add text where it would normally say shutdown you could add text such as "Turning off this computer will result in you in loosing my number". Has this been test on x32 and x64 OS's?