You dont wanna make a new cue file. Some require extra tracks, some games require copyright protection too.
Check your bios filenames
Horizon ver?
Just went through and made sure all bios were capitalized and at .bin. Using the original cue file that came with it. As for Horizon, I'm not positive. I used this guide t3chnolog1c.github.io/SwitchGuide/ to get the hbmenu ver 2.0.0