About Augustine it's because after Vita-Imana it was the most succesful album of Solola Bien. Augustine Ngaly is seen as one Werra's classic with Kalayi Boeing, Chantal Switserland, Fredy Movadi, Coco Madimba, 13 Ans, Blandine Pemba and Kaskin.
If it wasn't Surprise Kapangala he would start his concerts with Augustine, during the Solola Bien-days. After Kibuisa Mpimpa, he wasn't performing that song for a longtime, until they came with Double Zenith. Baby Ndombe, Ferre, JDT an co starting the concert with old songs from Intervention Rapide & Solola Bien (including Augustine) before that Werrason would come on stage until that Les Marquis was created. Then Augustine re-came his intro-song along with Suprise Kapangala until Temoignage.
Its like Parking Ya Baba of Koffi Olomide, which was like Koffi's athem from 1995 until 1999, starting every concert with that song.
Another thing with Augustine is that the instrumental of the intro, brings him like Kalayi Boeing back to his roots (Its mbala-folklore). You would notice that some of his big concerts in 2005, he would enter with the Solola Bien-instrumental, because of that traditional mbala-rhythm. That's one of the reasons why he used to love Japonais Maladi & Burkina Faso alot, for the way they were using those traditional rythms alot.