Not quite sure what you are talking about. There is a RunOnce key in the Windows registry that is used to cause things to run only on the next reboot. Do you have a link to information about the Run-Once that you have?
Im reading up more on it. It's an installer for different things. I think written just through batch with echo's. I'm...kind of familiar, but pretty new. basically, just a batch you run that runs multiple installs of .exe's.