Ok, made an iso of my Final Fantasy 7 disk. Loaded a BIOS into the main directory for the emulator, keeps going back to the load screen for psx4all. Can't figure out what I'm doing wrong.
im fairly sure a bios file is only needed for BIOS mode (i.e. not HLE). When what you described happened to me, it was because the ISO was corrupt. Try loading it in a PC PSX emu and see if it runs.