Its a long time ago but some things never change.
To get a job flying tourists around the game reserves you need time on the typical workhorses of the business, currently that means C206 and GA8.
You need to be physically presentable with the right attitude and personality to give the customers a happy experience. Above all you need to get lucky and be in the right place at the right time.
Nobody advertises pilot jobs, reads CVs or answers emails. The only way is to be hanging around at the right airfield making a good impression when an opportunity happens. Having friends in the right places is a good way of locating the possible jobs, do you know any pilots currently working in africa ?. Another problem is that governments are getting stricter about work permits which means that you can spend months sitting around waiting for paperwork with no pay after you have been offered a job.
Spend some time ploughing through the Maun and Namibia threads, there is a lot of good information there and asking questions that are already answered there is a good way to be treated as an idiot in this forum.
Good luck - you are going to need it but its a great life if you succeed.