Delete the SVCPACK folder (I386SVCPACK) if you don’t want to add other programs.
Also, if you want to remove unattended setup, name and company, etc. go to $OEM$$$System32 and edit OEMINFO.INI, then go to I386 and edit WINNT.SIF.
Use 7zip to extract files from the iso, edit, then create new bootable iso.