Office 2003 admin install set up issues

Hello,

I am in the process of setting up a new Office 2003 build
for deploying to all of our desktops. AS recommended, I am
trying to set up an Adminsitrative Installation Point. WHy
do I need to run setup.exe /s to do this. Can I not just
copy the folder structure from the CD onto a network
location? What does the setup.exe /a do that is different?

ALso, when I try running setup.exe /a from a command
prompt on my newly built XP box, I receive the WINDOWS XP
prompt of "Please go to the control panel to install and
configure system components". It won't let me do the admin
install. ANy ideas?

Simon