D'oh! Misread that.
Just go to your nearest vehicle licensing business. Tell them you have the papers and want to put it in your name.
They will give you a form, as far as I know it is not necessary for the other person to fill in that form, they are supposed to fill in another separate form and give it in.
Just remember though it will be the outstanding fees from 2010, most likely a small fine, as well as the road worthy test required (Think it's around R250 or so last time I did it) and of course the cost of whoever does the process for you.
I personally prefer using Moot Testing Centre.