How can I make my Power Save savings report more accurate?

IT administrators that manage computers with varying power consumption levels can create multiple Energy Consumption Profiles that are each tailored to a particular computer type. By matching the computer type with the respective Energy Consumption Profile, the accuracy of the energy and dollar savings reported by Power Save is increased.
When Power Save puts the PC into Standby or Hibernate and then a user wakes the computer into full power, there is no login screen necessary for the user to access the workstation. How can I make the user login in this situation?
Can Power Save override the default Windows power settings?