Logon Screen in Windows XP

How do I change what the button "Turn off computer" To "Turn off my computer" or something similar?? Where can I find these word, what file? Also, it's not logonui.exe or anything, I have it changed in there, but it hasn't changed it, it did however chchanget when I installed XPize 4.7 Beta 2 which can be found about here: http://www.xpize.net/?page=history when that was installed, it was working. However I didn't like the theme so I then installed XPize 4.5.1 and then it stoped working.

So sosomethinghat 4.7 changed wasn't changed in 4.5.1, but I'm not seeing what that is, so please answer!!!

Thanks!