You need this version to run Grand Prix World on Windows XP. "The original version of GPW and XP don't get along very well. Unfortunately the GPW team is no longer together but I've got the source code and have recently put together an unofficial version that seems to be stable with XP and Windows 2000. If you want it just click on the icon below. All the best Edward Grabowski"

Grand Prix World Official Patch
The patch contains fixes to a number of bugs including:
Autocalc errors, Fastest lap data, Championship points & FIA, Results Mail & News, Test days, Lap Chart, Banned drivers, Driver deals, Sponsor, New Season data error, Driver biographical data, Audio & FMV problems, Driver rating changes, Display problems, Staff for hire indicators, Replacemant cars, Voodoo 2 Crashes.

See the Readme file included in download for full details.