Infogrames have posted an apology on the official Grand Prix 4 site, grandprixgames.com about the patch fiasco.
Infogrames wishes to make it clear that the patch for Grand Prix 4 labeled "patch 4.0" and released on the website 2 September 2002 has now been withdrawn. The patch was produced and released in error by Infogrames without the authorisation or participation of Simergy Limited or Geoff Crammond. Infogrames would like to offer its sincere apologies for any inconvenience caused. A replacement patch will be made available shortly.You can still download the patch from SimRacingFiles.com, but it's now unofficial.