Hi Mav87th.
In the Data/sea and DataSubmarine folder there is every unit and in thos folders are that .val file that handle the wake. If a ship does not have a val file then its linked to another ship that has one.
Check your game installation for the val files after you have installed RFB.
If i dont recall wrong there was NOT many val files that was in the RFB it self so il guess they use the standard ones from stock.
You can open one of them whit S3D tool and compare whit anoother file from RFB or stock. By that you can se what i changed.
Everyship and sub has either 2 or 3 wake attatched to them that you can play around whit. But you can also add more wakes so they can have as many you like. But its darn time consuming to do so

So i didnt do this for the ships cuz it was so many of them but i added 1 extra wake for the submarines to smooth out some odd angles i got when i stretched out the wakes.
And i did about 3-4 ships at a time and made a test mission whit the missioneditor to se how they looked. So it was a lot testing for about 140 units

I Loaded the testmission. Noted the behaviour on the ships, specially when they do a turn, shut down the game, did some adjustment, loaded the game, hince repeate
If you want more detailed description what the values means/do and how to add more wakes i can for sure help you to get started

Just PM me then.
Vikinger.