I have an error message when I try to splitstream the .msp files to my administrative install of office 2003 (french). In fact, everytime I call "msiexec" it says :

paramètres de lignes de commandes incorrects
Windows Installer V2.0xxxxx

(= command lines switches invalid)

I use the following :

TITLE Office 2003 Slipstreamer brought to you by www.MSFN.org
CLS
@echo off
ECHO Please wait...
FOR %%f IN (*.msp) DO msiexec /p %%f /a D:\Mes Documents\Microsoft\msocd\admin\PRO11.MSI SHORTFILENAMES=TRUE /qb
ECHO Slipstreaming Completed!
pause
EXIT

D:\Mes Documents\Microsoft\msocd\admin\PRO11.MSI <-- There's a spacing in Mes Documents, so it needs to be surrounded it in quotations. Otherwise its trying to go to D:\Mes and it won't be found.

FOR %%f IN (*.msp) DO msiexec /p %%f /a "D:\Mes Documents\Microsoft\msocd\admin\PRO11.MSI" SHORTFILENAMES=TRUE /qb

it works

you're a genius ^_^