Is this the same artist as Nene Tchakou http://www.last.fm/music/Nene+Tchakou/+wiki
I have looked for the group International Zaistars but so far have found very little information on them. There is a mention of the group being based in Nigeria, and the bio link also mentions him being there as well.
Nene Tchakou is a highly skilled Lead guitar session musician who has performed with the Likes of Pepe Felly Manuaku, Koffi Olomide, Kanda Bongoman, Lucien Bokilo, Arlus Mabele and last I heard of him he was in NYC with Samba Mapangala.
He has had a very long career as detailed in his bio, and probably the group International Zaistars was a collection of session musicians given the name for recording purposes. This was common practice for big players to get a group together and record either one-off or a series of albums but they were never a solid group.
The Album sounds like the Soukus beats of the early 90's reminiscent of Loketo of Arlus Mabele, Matchatcha of Diblo Dibala, Kanda Bongoman and Kasav....
I will keep digging and update this with more information as I get it.