Or... you could use runas or SFimpersonator in your scripts to impersonate an administrative account for these tasks.

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Clarence

  I wish to write a script that would allow the adding of the currently
  logged in user to the local admin group (after supplying admin account and
  password).  Then being able to remove the user from that group.  It would
  make doing software updates infinatly easier.  I would not have to log the
  user out, make them a member, log them back in, run the update, log them
  out, remove them from the group, let them log back in to veryify blah to
  much stuff for such a simple process.  TIA!  This would be a life saver.