The best long-term solution is to use a "version spoofer" to tell the game you are on a higher firmware, or simply update to a modern, stable CFW (like 4.90+ Evilnat/Rebug).
For players referencing performance bugs or targeting visual adjustments inside the classic engine configuration files, use these manual tweaks to resolve standard gameplay hitches. Disable Native Mouse Smoothing Fix dead space 3 3.55