That is E-X-A-C-T-L-Y what I just described.
It is quite obvious to me that you didn't try it nor read the documents. Grrr.
Here is a little more detailed info.
Copy your winnt.sif to a bootable floppy with CD rom support. (Rename/move I386\Winnt.sif to A:\unattended.txt.)
Make the following line the last line in the floppys autoexec.bat file. Alternately you could create a batch file, or just type it at a command prompt.
E:\i386\Winnt.exe /s:E:\i386 /u:A:\unattend.txt
(IF E: is the drive letter of your CD rom and A: is your floppy)
This line tells setup to use the unattended.txt file on floppy instead of the winnt.sif on the CD
If the content in winnt.sif and unattended.txt files are identical both installs will be identical.
It is a simple boot floppy No changes to the original cd are required and the floppy's unattended.txt can be easily edited.
Thanks toolman good info...