It's been answered over and over that GPO is not the right solution for Office 2007 deployment. And if you get to make it work, this works with some limitations and quirks. BDD 2007 deploys Vista + Office but not Office by itself. Does Mircorsoft expect you to buy SMS or similar to network deploy Office 2007???
I'm upgrading computers that received Office 2003 via GPO, so I can uninstall them the same way.
I have found lots of TechNet doc about this subject but haven't come accross one that shows a step by step process to achieve this.