How does one mod assets from Die Rise to Origins?

[renraks0809]

I've seen 0 tutorials about this stuff online unfortunately, Tranzit and Nuke Town I see are IPAK files which I can just grab the textures from, but the rest are FF files, which I don't know how to open. Is there a way to convert those FF files into IPAK? Or just make those FF files into images I can swap out?

I hope anyone can help, I really like modding this game so far but I can't figure out anything to do with FF files on my own, and the discord didn't help either