Help me edit relogon screen please

When my computer becomes idle for a while, the screensaver is up. Then the re-logon screen is active if a user wants to use the computer again, which he has to re-enter the password. On the relogon screen I see the text "only <USERNAME> or administrator is allowed to use this computer", which makes me wonder where that text is stored in the computer ? I would like to re-edit it to whatever I like. Is this possible ?

THank you ;)

http://www.resedit.net