To get around the issue of shared accounts we have begun using a product called "Unlock Administrator" http://www.e-motional.com/ULAdmin.htm
Once the system is logged into using a generic username and password it is locked
in the standard Windows fashion and the system is set to lock when the screensaver is activated as well.
This program allows you to select which users are able to unlock the system using their own Windows domain credentials. A log of when the system is locked and when and by whom it is unlocked is kept in a protected file as well as a Windows
Event. Users don't have read or write access to this file. This way we have complete knowledge of who used the account and when. Everyone uses their own password and no password needs to be shared.
Hope someone else finds this useful as well.
mArtY