I'll try dumping the iso on my computer. What shoukd i use to explore the ISO?
Anything that opens ISOs -- when people note the PS1 uses CD format they mean it both in terms of the physical thing and the format it uses. I forget the restrictions placed on it (iso9660 has a few variations in terms of flags, filesystem, file name lengths and whatnot) but extraction should not be an issue with even basic tools (as in 7zip's handling will probably be enough for an extraction, assuming you don't just use Windows explorer to copy the files when you pop the disc in the drive), should you have one of the fancy iso handling tools (ultraiso and the like) then even better.
Some square (enix) games did some oddities, and some games did some stuff for anti piracy. The average demo disc though should be free of that -- they are demos after all and while the PC was just learning about people swapping demo exe files with the real deal it would be a while before consoles did anything there.
I pulled apart one a while back for
https://gbatemp.net/threads/found-t...-quite-different-to-na-pizza-hut-demo.556304/ but yours might be different. In that case it was all named nicely with things in a directory, and could be loaded separately. However I can just as easily see it becoming like the times we get to make a single game out of a selection be the one that is loaded, which is usually not so bad (you find the command to launch it in the launcher and make that command fire early in the launcher boot, possibly pausing to set up some IO as you do), if you then wanted to strip useless data out of it that could be harder but is still not usually that bad.
You can see the file names there on the link, but I don't know general things to look for on the PS1.
- and in the game settings in OPL you can change the elf it loads.
