help with silent install, adminfile command won't work

I am trying to upgrade my company to office 2007 professional through sccm.
When using my custom msp for office 2007, this works great on newly built
machines, but the computers that have already been deployed already have
outlook 2007 installed. the /adminfile switch will not allow me to install
the rest of the products due to the outlook instance.

I have tried to uninstall outlook and then use the /adminfile switch, but it
still won't work because it is still recognizing the office 12 folder or some
other instance of the product.

I need help upgrading the rest of the products in this suite. Does anyone
have any suggestions to try?