Are you using the right switches? I got the information below from this site http://www.appdeploy.com/packages/detail.asp?id=1381
"Download the exe. Click to install & it will extract files. Let it extract, and then click the option to cancel the install.
From the location you extracted to:
msiexec /qb /norestart /i openofficeorg30.msi
For install OpenOffice 3.x without extract the msi before, you can use this command line :
OOo_3.x.x_Win32Intel_install.exe /S /GUILEVEL=qn
For 3.2 3.2.9502 I used the following...
This will install it silently.
Full Command Line: "ooo_3.2.1_win_x86_install-wjre_en-us.exe" /S /GUILEVEL=qn"