All you need to do is open up Notepad and type the following line:
xcopy {File you want to copy} {Where you want to put the copied file} /H /I /C /K /E /R /Y
Strictly speaking, some of those switches at the end are unecessary, but hey, they do make it easier to remember.
Anyway, just save the file, making sure it has a *.bat extension (put double quotes around the filename when you type it, ie "file.bat"). Then double-click when you need it to save.
Making it automatically update each day, however, is a little beyond what I'm really qualified to do. Check out Computer Hope's own DOS section and the DOS forum here.