The community has spent decades refining these conversions. The standard PopStation (PS1 emulator for PSP) builds were fine, but they suffered from frame dips, audio crackling, and slow-downs during the Nemesis’s rocket attacks.
To ensure your Resident Evil 3 EBOOT performs optimally, verify these settings in your handheld’s emulator menu: resident evil 3 nemesis ebootpbp 12 better
If you meant a specific mod (like v1.2), that might be a fan hack improving door skip, item randomizer, etc. — search for "Resident Evil 3 Seamless HD" or "Resident Evil 3 Restoration Patch" instead. The community has spent decades refining these conversions