I have another suggestion for RU5. You should finaly resolve the conflict with Forefront Protection for Exchange that causes the Information Store to not start back up. These are both Microsoft products and should work together. At a minimum there should be a pre-install notice. Also how do you deal with doing this via windows update?
FYI
“For those of you running Forefront, be sure you perform these important steps from the command line in the Forefront directory before and after this rollup’s installation process. Without these steps, Exchange services for Information Store and Transport will not start back up. You will need to disable ForeFront via "fscutility /disable" before installing the patch and then re-enable after the patch by running "fscutility /enable" to start it up again post installation."