I'm having a little trouble understanding exactly what you are asking but from the sounds of it, you want to know where to put a batch file that will launch setup????? You can launch setup from a batch file from a network share, or from a DOS based shell environment from say a DOS 6.22 floppy disk or formatted partition. Why would you need two unattend files? If you need a second command file that will install other applications you can use any number of methods discussed on this forum. Use the search feature to locate your answer and examples of how-to accomplish the task. As for the WINNT.SIF file, it will handle the entire installation and can call external scripts and programs to complete the installation. To have it execute during installation put the file on a floppy or copy it into the i386 directory.