Chiming in to say R06 wasn't working with my steam version at first, tried the game converter method and now it's dandy.
The 60fps battles are so crazy nice, I was stunned by how nice it looks seriously. Amazing job DLPB and co.
I think? I got the SYW upscales working properly by unpacking the .iro and placing the 'world', 'field', 'battle' folders into 'SteamApps\common\FINAL FANTASY VII\The_Reunion\GLOBAL\Texture'
and it seems to load fine but there were some other loose files in some of those unpacked iro that I dunno what to do with.
Everything looks so great in-game though, I'm really happy with it. The only other mod I'd want is the one that updates the swords on Cloud's back with the corresponding equipped one, idk how compatible that would be with R06 though or how to get it outside 7H.