I do have Samsung s4 mini KitKat 4.4.2, non rooted, and have the Primo 9.6.29.427562 installed (however I do not remember anymore exactly which apk).
I installed as described in post 6 and it works completely with speedcams, TMC and all "eye candy" (3D, dimka skin ...) !! (No TTS however, suitable TTS voice missing/not found yet)
And yes, I know you replied in post 7 my method don't work for you.