My laptop needs some formating and fresh start, after this i can create server and then i see what i can find out.
I'll keep you posted
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Quite difficult to get the ping to float in server to find it first, but anyway i found out that the main memory address that changes the displayed ping is 0078A016, it changes ping within interval. Some others that reads from it was 007AC288, 007AC29D and 0077AC74 one of the first two is in-game info and the last was program "H&D 2 Server Info", but they only read the value from there.
For the ping some of addresses: 01114A04, 01114AC8, 0114940, 00C54A1C but i dont know the range for those addresses.
If i replaced 0078A016 with "nop" and changed this ping, then it was fixed value and game never changed it again.