Phoenix R3 is a program which allows the creation of full custom tracks. Its features provide the ability to make tracks of comparable quality to those in the original release, and gives the player more freedom than was offered in the original release.
WolfR4 is a custom launcher tool currently under active development, and similar in premise to Phoenix R3, but with expanded capabilities (however it should be noted it only supports patch 1207).
Go to <path-to-game>\cars\ and then enter any sub-folder with a car in it, they are able to edit the vehicle parameters in the 'Parameters.txt' file. This allows the user to change the top speed, acceleration, steering rate and wheel size, as well as detailed vehicle dynamics settings, effectively allowing the user to 'tune' the vehicle.
The v1.2 Update has a number of unresolved issues.
A number of situations will currently cause the game to crash, none of which have yet been resolved. Currently, these include:
Graphical glitches are common in v1.2. A basic listing of unresolved issues is as follows:
There are a number of issues with the game's multiplayer mode, including crashing and object inconsistencies, as well as bad syncing and bad starts, often preceded by a hang at the loading screen. Saving replays also often results in a bug. There is currently no known fix for any of these issues.