In order for controllers to work correctly in many region-free games from North America or Japan played on a PAL TV through a composite cable, the system's video settings must be set to 60 Hz.

Call of Duty 2 US Version, works on Japanese system
Quake 4 US Version, works on Japanese system
Condemned: Criminal Origins US Version, works on Japanese system
Gun US Version, works on Japanese system
Tony Hawk's American Wasteland US Version, works on Japanese system
Ridge Racer 6 US version, works on PAL/European systems - needs 60 Hz
Dead or Alive 4 US version, works on PAL/European systems, NOT Japanese system - needs 60 Hz
Amped 3 US version, works on PAL/European systems
Full Auto US version, works on PAL/European systems and Japanese systems
Ghost Recon Advanced Warfighter US version, works on PAL/European systems and Japanese systems

None of these games are confirmed region-free, but they do display text and menus in English when the console is set to English language.

Ridge Racer 6
Perfect Dark Zero
Project Gotham Racing 3 (English, confirmed by Bizarre)
Dead or Alive 4
King Kong
Kameo: Elements of Power (English, not region-free, confirmed by Rare)

so is the games

Call of Duty 2 US Version, works on Japanese system
Quake 4 US Version, works on Japanese system
Condemned: Criminal Origins US Version, works on Japanese system
Gun US Version, works on Japanese system
Tony Hawk's American Wasteland US Version, works on Japanese system
Ridge Racer 6 US version, works on PAL/European systems - needs 60 Hz
Dead or Alive 4 US version, works on PAL/European systems, NOT Japanese system - needs 60 Hz
Amped 3 US version, works on PAL/European systems
Full Auto US version, works on PAL/European systems and Japanese systems
Ghost Recon Advanced Warfighter US version, works on PAL/European systems and Japanese systems

like the ones in bold compatible for use with PAL?