Customizing Automated Messages in Partner Center

In the Partner Center template, there are system-generated messages that we would like to have the ability to edit; specifically, the "reset your password" email and the "your password has been changed" email. These automated emails tell contacts to contact us if they need assistance, but give no way for them to reach us, and since we cannot edit these emails, our contacts are left to try to figure this out. Additionally, we are not able to put a logo or a signature line that would let people know who this email is from.
We were able to customize the "complete your registration" email somewhat. It would be nice if we could customize all the other emails that are part of the Partner Center.