we can change the inno script to do that job.
add the next piece of code
after the
[Files] and
before the
[code] sections.
Code:
[Registry]
Root: HKLM; Subkey: "Software\Konami\PES2009"; ValueType: string; ValueName: "code"; ValueData: "MYCD-KEYG-OES-HERE-LOL!"
keep the quotes.