[Legbreaker]

I agree that China will be virtually in active in Africa after 1995. Once hostilities kick off involving Nato, I suspect that the South American countries in addition to Australia and New Zealand will become more active, at least from a trade standpoint than the northern hemisphere.
I do not see France as particularly active as they have several wars being fought on, or close to their borders at home. The majority of troops will be stationed there pre nuke just in case there's an incursion. Post nuke and the troops will be needed for civil defence duties which includes maintaining the rule of law and disaster relief.
This is not to say they won't have troops in Africa, just that they'll be limited to the bare minimum required to get specific jobs done.

Trade routes are likely to change dramatically since virtually every country in the northern hemisphere is a war zone. The southern hemisphere by comparison is almost conflict free so I can see food, raw materials and other shipments which would have gone across the equator staying south.

Many of the less stable and resource poor regions are likely to be completely abandonned by outside influences. Civil war would probably erupt on a wide scale as tribal differences, quelled for the most part by external influence, bubble to the surface. National borders would mean nothing (having for the most part been artificially applied by colonising powers in the previous century or three).

South Africa as a country would be in a bad way in my opinion. Apartheid was still in effect until the mid ninties (the elections in 1994 brought in the ANC and pushed out the white National Party that had been running the show for living memory). Although this was the end of white domination, there are still many, many cases today where whites effectively control the wealth and power. With the hostilities elsewhere in the world diverting the attention of those who might otherwise give a damn, the region is likely to have exploded into violence.

Zimbabwe is probably a good example of what Africa as a whole might look like. Ruled by a strongman, it's essentially ignoring all outside influence. Living conditions for the majority of it's people are poor with medical care minimal at best. Food should be plentiful, but as the ruling "class" are more interested in forcing people from their property to "redistribute" the land to their supporters (who do little more than squat on the land without working it) most end up starving. Nearly no gods enter to country so replacement parts for machinery is difficult to come by. There's more, but a few minutes on google should give all anyone really needs.