Sites like PESRetro are well-known within the PES modding community, but downloading from old, archived, or user-driven forums always carries risks.
If you are encountering a "zoom" error (like the camera being too close or the game crashing), the most likely solution is updating the kitserver config file, not necessarily a separate ".rar" file called "Pez6zoom". To get you the right fix, could you tell me:
What are you having? (e.g., Camera too close, or game crashing with a "zoom" error?) Are you trying to play online or offline ? Let me know so I can help you find the correct patch! Problemas de Zoom en Parches PES 6 (Posible Solucion)
Ensure you are downloading from an established community member on the forum.
The "zoom" issues in PES 6 typically relate to community-made patches (like kitserver) that allow users to change camera angles or fix compatibility issues with modern monitor resolutions.
Before opening the .rar , scan it with Windows Defender or an independent scanner.