Maybe this will help. It reportedly works for XP too. Its just some info I saved to a text file many moons ago.
Requirements for Using the "WINNT32 /SYSPART" Command
In Windows 2000, the /syspart parameter for Winnt32.exe causes Windows 2000 Setup to copy all the necessary boot files and temporary Setup files to a drive and mark the partition as active. You can then install the drive in another computer,
turn the computer on, and continue with Setup.
MORE INFORMATION
To use the winnt32 /syspart command, the following conditions must exist:
You can run the command from a Microsoft Windows NT 4.0-based, or Windows 2000-based computer.
The server or workstation must contain two hard disks; the second hard disk must be the destination disk.
The second hard disk must have a primary partition. The /syspart switch sets this partition as active..
The second hard disk must be formatted so that Setup can copy files to it.
There are no limitations as to the hardware in the target computer.
The information in this article applies to:
Microsoft Windows 2000 Server