I guess I was really the only, who was interested in it.
To conclude it:
A look-up table (8010AE20 German pal ps1) is created every time the party enters the world map. It is possible to have identical numbers next to each other. At least for reloading, the numbers inside the table are depended on the in-game time. The Seed (8010AE1C/8010AE1D) starts with the last value in the table, which happens to be 08 02 (position 520). The 02 counts how many times the first value has overflown. When the Seed advantages further it jumps to 00 00 and a new look-up table is created.
The Seed advantages via three methods. The first method is using the left/right and the view rotating buttons. While both types of buttons increase the Seed by one – doesn’t matter, which vehicle is used – the left/right buttons also increase the Stepscounter by one if there is place to walk by foot/Buggy. The second way is to get a battle check. The third way is to be in the following area. Every ca. 64 frames the Seed increases by two:
To reset the Seed a reload or a random world map encounter is necessary.
The Stepcounter (80116240) starts with 74 and it wont increase the danger counter (80116249) till it overflows for the first time (74 FF --> 00 00). It advances by using the movement buttons. After the first overflow it starts cycling from 00 to 10 and after the next overflows a battle check occurs. Every time the party enters the world map the Stepcounter is reset to 74. Entering means after a battle, coming from a field map or reloading. Another way is to get off a vehicle, which resets the counter to E2, hence it is possible to never have an encounter with the buggy.
For the enemy encounter formation I will only state the additional stuff to Terence’s Enemy Mechanic FAQ. At first the Yuffie (in forests) or the Chocobo (everywhere else) battle is checked. After that the pre-emptive check follows. If it is successful, than the next RNG Seed checks for a normal battle instead of a back attack battle.
If a pre-emptive materia is equipped, the chances are doubled (128/256 instead of 64/256). This translates into almost halving the chances for getting a special battle from no pre-emptive materia to master pre-emptive materia. The ambush alert halves the chances even further.
In North Corel the chances doesn’t add up to 64 but 56. The remaining 8 leads to nothing. There will be no battle and the danger counter is reset to zero.
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So I’m going to clarify my point, even you may already understood. 
