Sure you might need that unique registration number your professor had a third party company generate for some online resource he's getting kickbacks on, but you can probably find a crack for it in a forum somewhere or something.

Don't let the extreme financial pressures of college, expensive mandatory meal plans, the crushing rent you pay for a dorm, or the dark spectre of a lifetime of looming student debt on the loans that both you and your parents signed bring you down - save a dollar on your textbooks and don't buy new!