The unique ID for an installation, the pathname for the UDF, the name of the answer file.
Winnt.exe is the 16-bit version of the setup program and Winnt32.exe is the 32-bit version. (Courtesy of CompTIA A+ Guide to Software, fifth edition, Jean Andrews)
Winnt.exe is the 16-bit version of the setup program and Winnt32.exe is the 32-bit version. Both are located in the \i386 folder on the CD. You can use Winnt.exe for a clean install or an upgrade on a computer running windows.
winnt.exe = 16-bit clean install winnt32.exe = 32-bit upgrade
If I remember correctly winnt.exe is a 16-bit program while winnt32.exe is a 32 bit program.