Its probably already been covered;
we're travelling to moz in november for a month and will sty in south mozambique. We will fly into jo'burg and rent a car there. We were wondering whether it would be best to rent a 4wd during that time or whether you can get to most places in a standard car.
If money is not a problem, I would hire a 4x4, but next best would be a 2WD 'pick-up' which will get you to most places. I have done something amazing things on very bad roads in a VW Golf (non 4x4) too.