Yeah the cue file is in with the iso file, but if the iso works in RetroArch, shouldn't it also work in LB? I tried to convert the iso to a cue/bin just to see if that would work, using program called PowerISO but got an error that the file was too large and wasn't able to. Also tried locating an alternate trustworthy cue file but isozone seems pretty sketchy. Tried using Turborip to rip the files from my physical disc but not sure how to translate that to work. Could it be because my PC is treating the cue files as VLC?