It needs to have txtsetup.oem file in it and be suitable for Text mode part of the installer. Supply a floppy image with the appropriate SATA/AHCI drivers using the advanced option “ Custom drivers/F6 floppy image for 2000/XP/2003 Setup“.Integrate the proper mass storage drivers with nLite beforehand.Switch AHCI(SATA) mode to IDE (Compatible) in BIOS if there is such option.Including other driver packs (Sound, Video etc.) makes such source quite universal. Integrate BTS mass storage drivers pack into your source before preparing the USB disk.It would select and add the appropriate mass storage driver to a virtual floppy, which will be used by Setup to add the needed drivers. Try the integrated DPMS option before starting Text mode, try “ Auto-detect and use F6 SATA/RAID/SCSI Driver” menu first, if that doesn’t work for you and Setup bluescreens or hangs for example, then try “ Auto-detect and use F6 SATA/RAID/SCSI Driver + Firadisk“.
Windows NT4/5 (2000, XP, 2003) does not have built-in support for SATA/AHCI controllers.