See this?:
Apparently that Canadian likes to work on a low level when it comes to editing the game, but do you all like those hexadecimal representations and doing a game of trial-and-error just to satisfy your needs of changing game content? If you do, escape this topic right now, if you don't, then you might not be too lazy to download the following...
The LR2 Hex Editor is exactly what it says, it manipulates the LEGO Racers 2 executable by altering the hexadecimals of the file. Only this time you don't have to look inside the file and view the raw data, the program does all the editing for you. By using the data that Xiron gathered (see the topic linked to) you can manipulate the contents of the file yourself by just selecting an item like amount of laps in time trial or minifigure running speed and then enter a 'human-readable' value like a decimal number to change the current selected code to. Though be sure to close the program to make all changes go active.
Xiron has also made a patch to go along with this release that you can install onto your executable to change game content in one go. The readme included in the download explains more on how to achieve this. You can also make your own patches by first altering the items to your likings and then add the items you changed to a patch you will name.
The links below directs you to a mighty deposit of ores, crystals and Java-stuff. The .zip included contains files that should be kept together in their folder in order to have the program not complain about 'missing this' or 'couldn't open that'. The only thing you need to add to the folder is your "LEGO Racers 2.exe". I'm not a well-versed GUI programmer at this moment so the magic happens in the console. Also, since this is the very first time I'm distributing a Java-written program I had some troubles trying to execute the runnable by simply clicking on it. For now you will have to issue a command in the console to start the program (see readme). If the program does not run (or something else goes weird), there is a log file that logs the program activity and errors, so you might want to consult that if things don't work right away. I'm pretty sure there are still good ways to break the program, but be nice to it, don't pick on him just because it's new to you.
Download: http://oresome.rockraidersunited.com/download/219 (comes with custom patch, contains...)
Source (Eclipse IDE project): http://oresome.rockraidersunited.com/download/220
tl;dr: editing executable in a more user-friendly way, comes with a patch Xiron made to quickly install altered game content