For some unknown reason, Microsoft removed the ability to apply transform files to the Office 2007 suite when installing via MSI. On the flip side they made it much easier to deploy patches in MSP format to Office 2007 when installing via the traditional setup.exe. Give and take I suppose. Why is this a problem? Well if you want to deploy any or all of the Office 2007 suite via Active Directory Group Policy you will need to get a little creative.