LHugh,
Please explain what you want to do that requires you, as a DBA, to log into someone else's account. There are very few actions that a DBA cannot accomplish without logging in to a specific user. If your answer is one of those things that actually requires your logging in as that user, I'll share some ideas on how to do it.
Dave
Sandy, Utah, USA @ 08:01 GMT, 01:01 Mountain Time