The ICR2 track folder contains the following files:
| Filename | Description |
| <track>.txt | Track and race parameters such as pit lane location, green flag location, and more |
| records.txt | Contains the player’s and real world lap records |
| maxpanic.lp | AI line – left boundary |
| minpanic.lp | AI line – right boundary |
| maxrace.lp | AI line – left boundary that AI will race |
| minrace.lp | AI line – right boundary that AI will race |
| pace.lp | AI line – pace lap |
| pass1.lp | AI line – used for overtaking |
| pass2.lp | AI line – used for overtaking |
| pit.lp | AI line – pit lane |
| race.lp | AI line – default line around the track |
| default.st1 | Current car setup |
| <track>.dat | File archive for remaining track files. The files within can be extracted into the track folder and the track will still be fully loadable. However, if the .dat file is present, the game will use the files within the .dat file as priority over any similarly named files within the track folder. |
Files within <track.dat>. These files can also reside outside of the .dat file, within the track folder. However, if <track>.dat exists, the files within <track>.dat takes priority.
| Filename | Description | How to edit |
| <track>.3do | 3D model of the track used to visualize the track within the game | Track editing overview |
| <track>.trk | Definitions of track geometry (i.e. walls, surfaces) that affect where the player can drive within the game. The locations of walls, surfaces, etc. in this file generally need to be consistent with the <track>.3do file. | Track editing overview |
| <track>.cam | Defines the position and panning/zooming behavior of each TV camera along the circuit | Python tool |
| <track>.scr | Defines which TV camera is used depending on where (i.e. DLONG) a car is along the circuit | Python tool |
| sunny.pcx | Image file containing the 256-color palette for the game when this particular track is loaded. Each track may have a different palette file. | Palettes |
| sky.3do | 3D model of the sky, loaded and displayed separately from <track>.3do. | Commonly taken from other tracks |
| horiz.3do | 3D model of the horizon, loaded and displayed separately from <track>.3do. | Commonly taken from other tracks |
| hdiagram.stp | Track map for the menu (hi-res) | WinMip |
| ldiagram.stp | Track map for the menu (lo-res) | WinMip |
| htshotc.stp | Track picture for the menu (hi-res) | WinMip |
| htshotg.str | “Bluescale” track picture for the menu (hi-res) | WinMip |
| ltshotc.stp | Track picture for the menu (lo-res) | WinMip |
| ltshotc.str | “Bluescale” track picture for the menu (lo-res) | WinMip |
| mtshotc.pcx | Track picture for the Windy menu | Various image editors |
| map.pcx | Image file containing the 256-color palette for the menu screen | Various image editors |
The .3do files above may reference other files, including .mip texture files, .pmp texture files, and other .3do files. All of these files must be present in the track folder or .dat file in order for the track to load.