WinXP DOS setup program file?

[ai42]

Ok I am installing Windows XP on a CD-less laptop. I copied over the entire contents of the XP cd, and I used a boot disk to access the files on the hard drive. However, the setup.exe file (in root folder) is a win32 application. What exectable is the file that starts the DOS based XP installation?

EDIT: NM I found it its /I386/WINNT.EXE