Over the years, various cracks and no-DVD patches were released. The original pes6.exe (version 1.0) had copy protection. Groups like , Reloaded , and later evo-web modders released updated executables:
"Unable to find a graphics card that supports Shader 5.0" pes 6 settings exe 5
To recap:
Use PES6 Editor or Kitserver for safe advanced tweaks. Over the years, various cracks and no-DVD patches