1) you can find the War 2 for PSX source on Archive. It has all the Windows stuff commented out. It might be possible to uncomment and compile with something like Borland C or Watcom C or whatever they used.
2) the modding scene was phenomenal. Not mentioned is StarDraft for obvious reasons but a counterpart to WarDraft. This is where our story takes a turn and the name Camelot Systems emerges, along with a King Arthur (Andy Bond) who shortly after finishing his comp sci degree went to work for Blizzard and has been with them since. This website is a homage to CamSys (JorSys).
3) War2Bne is a thing to behold. Diablo, Warcraft 2 et al being able to seamlessly chat and DM players across games was pure magic.
Many stories to tell, but we will never step into that river again. Legends never die.