Here’s a cool tip I found. You can prevent Office 2007 and 2010 setup from wanting a reboot by doing the following.
(This is assuming that you’re using a MSP file for an automated installation by the way…)
First go into the Office Customization Tool and open up an existing MSP or configure a new one. To prevent a reboot however to the the “Modify Setup properties” section, then add a property named “SETUP_REBOOT” and give it a value of “Never”. (the property name must be in caps)
By doing this your better able to control the outcome of your automated installation. In my case, my automated Office 2010 beta installation would reboot for some people, and then not for others. That made it difficult to use ConfigMgr because of the reboot properties for the task. By adding this property to the setup and knowing that setup will never reboot by itself, I can just have the ConfigMgr install task prompt the user for a reboot, therefore cleaning up the rebooting of the installations as well.
Here’s a link to MS that shows more info on setup properties.