If you own the original disc (PS1 or digital PS3/PSN release), creating your own EBOOT.PBP is the safest path. Use with a fresh rip of your disc. For the "12" variant you possess, treat it as an educational artifact: unpack it, compare its files to a known 1.0 or 1.1 release, and learn how community patches improved stability. By understanding the underlying emulation layers, you ensure that Resident Evil 3 remains playable—not just as a nostalgia trip, but as a reliably terrifying experience, where the only crashes are the ones Nemesis causes, not the ones caused by faulty emulation.
Even the legendary "Version 12" isn't perfect. Here’s how to fix common problems: Resident Evil 3 Nemesis Eboot.pbp 12