NFS High Stakes EXE addresses and modifications.

[DrSpeed]

000C248F - AI drivers to shuffle through in arcade mode. Set it to 48 and it'll use all drivers from Career mode as well as the police ones. (Default: 07)

000C24BF - AI police drivers to shuffle through. The game sets their names with the generic UnitNumber, so you won't see the names of them. Maybe their driving style is different but it's too hard to tell. (Default: 08)

000C3B3E - Number of Laps in Arcade Knockout (Default: 02)
000C40F6 - Number of Laps in Arcade Tournament (Default: 04)

000C5028 - Number of... Player 1?
Setting this to 2 will create a "duplicate" player in splitscreen Hot Pursuit that's controlled by AI. It will also loads AI cops or racers, depends on who's cop, racer or both.

000C5097 - Number of Player 1 clones?
Setting this to 2 will force player 2 to have the same car, name and color as player 1 in Hot Pursuit. If player 2 chooses a cop car, it will still act as a cop.

[pete9516]

NICE so technically these could be used for ghost files to have additional variety of different traffic cars?

Yes, it's possible to do that.

Found some arcade Knockout and Tournament stuff:
000C3E31 - Number of Racers in Arcade Knockout. Recommend to keep this at 8, as the game will load a second AI with the same name. Last race will also have more opponents instead of just 1.
000C42B3 - Number of Racers in Arcade Tournament. Recommend to keep this at 8 as well. (Default:8, 9-10 is functional*)

001B6DF8 - Tournament Points 1st Place
001B6DFA - Tournament Points 2nd Place
001B6DFC - Tournament Points 3rd Place
001B6DFE - Tournament Points 4th Place
001B6E00 - Tournament Points 5th Place
001B6E02 - Tournament Points 6th Place
001B6E04 - Tournament Points 7th Place
001B6E06 - Tournament Points 8th Place (Default:0)
001B6E08 - "Tournament Points 9th Place" (Default:A)
001B6E0A - "Tournament Points 10th Place" (Default:0)

*You can increase the points for 1-8th place so the last 2 points makes sense. Unless we know what address 001B6E08 and 001B6E0A does, I don't recommend changing these at all.

I also found the tracklist and conditions for each difficulty. But I'm gonna leave it as a text file in this post instead, because there's just too many addresses.

I'm somehow having troubles using the addresses from your text file. When i add them in Cheat Engine, the addresses show silly values and when i change them, nothing changes in the knockout. I've tried both game executables. Same applies to your newly found adresses like 000C248F

[DrSpeed]

Strange, it's working perfectly fine on my end.

[pete9516]

Strange, it's working perfectly fine on my end.

No matter which adress i choose, it always displays some and that's it. I tested on Cheat Engine 7.2, 7.4 and 7.5. I tested on x86 version and 64bit versions. I tested on both nfs4.exe and nfshsgame.exe. I can't explain why this is happening to me