Select Exhibition from the main menu, and then Drivers. Highlight Driver Williams and press A. Next highlight Edit Name and press A twice to highlight the first initial of the name, and change it to one of the following:
MUSEUM for the Gallery Option
PYRITE for the Gold Driver
You must press A when finished, pressing B will exit you out of the Edit Name function and the driver name will not be changed.
Choose the Gold or Silver Driver, and go into an exhibition race. Select manual gears in the options. When the race starts stay in first gear and you will have infinite acceleration (NOTE: this won't work once you have taken serious damage.) On the Hockenheim circuit you can break 1,000kph!