My question is can you set file type's default opening programs with group policy. The reason I ask this is it seems that .TIF files lose their default program when you install Microsoft Office 2010, preventing users from open the files from an email. Thanks ahead of time.
You can do this using Group Policy Preferences... under Computer Configuration Preferences, Control Panel, and Folder Options. You can create a new file type in there and associate it the way you like. Make sure to use %systemvariables% though :)