Brother of Hamlet - This is - as you write - exactly explained Brown Dog in the post, which you pointed out - [Only registered and activated users can see links. ]
Read it carefully - and understand everything.
I will not duplicate answers Brown Dog - but the principle signaling SpeedCam for TTS and Non TTS - is the same.
In addition, Brown Dog explained in detail which are based on records and distance signaling SpeedCam's - also depending on the speed.
This - what you write in the second part - you can be achieved by using TTS (I wrote about it).
and regardless of the speed - if you exceed the limit on the stretch - in settings (eg. Skin Doupas), you can simply select that signaled the speeding and repeated the signal) - without digging in sys.txt
PS2. Immediately see if the skin - GjAK_v2.3_AriNe 25DA - the work is different?