I bet there won't be any Jazz stuff in OMF Battlegrounds because:

1. Yes, the OMF2097 game was distributed by Epic (now it is a legal piece of freeware ), but it was programmed by Diversions (who owns the rights).

2. Diversions was making a 2D sequel to OMF, but they abandoned it for making a 3D one.

3. Diversions worked with Epic, they had access to the Unreal Engine which they modified for making it suitable for a non fps action game , but Epic didn't care, so Diversions people quit from Epic, and started making the game under their new engine .

In other words, I don't believe you're gonna find Jazz in OMF because it isn't related to Epic in any way.

Epic is not a game company anymore, it is just a game engine company