Setupmgr has changed a little. But it used to create winnt.txt for use on a floppy drive. So MsDosInitiated = 0 is used for calling winnt.exe directly from the floppy or via other manual means. Then, if you if you decided to make a cd version, you would rename winnt.txt to winnt.sif, and ensure that MsDosInitiated = 1, so the gui setup would take command. Unattended.txt is for network use. It has no greater powers, other than those needed for network usage. Sysprep, well, you should try it atleast once. Basicly you install windows onto the harddrive, do whatever customizing that you want, then run sysprep which strips the identity and traces from the os and then seals it. So you can deliver to a customer as is, or ghost to a cd. Only takes about 5 or so minutes to copy from cd, then minisetup runs, installing drivers and such. Goes through obee process, asking for account names etc. So in about 15 minutes, you have windows installed. Hope this helps your questions?