Here are mine so far.
|057E: clear_radar 1?|
This makes the radar completely grey. Used during the stadium events.
|0507: camera_has_interference 1?|
Creates static on the screen as an overlay. Used in the elevator cutscene of "G-Spotlight".
|04C7: camera_has_scanlines 1?|
Creates green scanlines and a frame counter on the screen as an overlay. Used at the golf course, and during the "Rub Out" cutscene.
|02D3: boat 10784?? drive_to 171.0578! 942.3843! 6!|
This opcode is incorrect, I suggest changing it to
|02D3: car $stinger drive_to -936.5! -282! 10.5! offroad|
as the vehicle goes to the place 'as the crow flies' ignoring obstacles.