You could use either sugar or the Mr. Beer packets. They'll both technically work, but they won't give you spectacular beer. That being said the Enhancer 2 probably wasn't going to give you a great beer to begin with. If you can get your hands on any malt extract it would work better, but straight sugar will definitely ferment. It may end up being a little dry with just sugar though.
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience. - C. S. Lewis, English essayist & juvenile novelist (1898 - 1963)