Changing the LogonPrompt Text

When users sit down to our lab machines, they're usually already logged in and ready to go. When they're not, they have to go through the ole' three finger salute and login. Well, there's usually the question of "What's the username and password for the lab computers?". To optimistically try and circumvent this incessant question we have a the LogonPrompt defined to display text of the username of password for these public PC's. There's no security risk here as the account info is supposed to be known by anyone who wants to sit down and use the machine. In the event that the password changes for the accounts, I have this reg add command ready to go (copied and pasted into a batch file containing a line for each machine):

REG ADD \\machine_name"\HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v LogonPrompt /d "Logon as 'wks01' With Password 'Public01'" /f

Works like a charm. Now, how to program the users to actually READ this info?