On the WindowsXP CP, in the SUPPORT\TOOLS directory,
there is a file called DEPLOY.CAB.
Extract the programs DEPLOY.CHM (help file) and SETUPMGR.EXE (main program)
Run SETUPMGR and answer the prompts.
This will create both a unattend.bat and unattend.txt file you can use for automated installs.
Note: The batch file might need some minor modification for file locations but it is fairly basic.