The default location for the jk2config.cfg file is
\Steam\steamapps\common\Jedi Outcast\GameData\base\jk2config.cfg

Once you locate jk2config.cfg create a copy of the file & rename it to autoexec.cfg this will allow you to simply paste in the lines you want to use from the guide, open the autoexec.cfg file with WordPad to begin adding the command lines.

make sure you keep the autoexec.cfg file in this location Steam\steamapps\common\Jedi Outcast\GameData\base\

The following commands are pretty generic which should benefit anyone regardless of your hardware configuration.

seta r_allowExtensions "0"
seta r_ext_compress_textures "0"
seta r_ext_compress_lightmaps "0"
seta cl_mouseAccel "0"
seta r_ext_compiled_vertex_array "0"
seta r_picmip "0"
seta r_detailtextures "1"
seta r_texturebits "32"
seta r_texturebitslm "0"
seta r_colorbits "32"
seta r_stencilbits "8"
seta r_ext_gamma_control "0"
seta r_overBrightBits "0"
seta r_ignorehwgamma "1"
seta r_gamma "1"
seta r_intensity "1"
seta r_fullscreen "1"
seta r_lodCurveError "999"
seta r_lodbias "0"
seta r_dynamiclight "1"
seta r_dlightBacks "1"
seta r_textureMode "GL_NEAREST_MIPMAP_LINEAR"
seta r_ext_texture_filter_anisotropic "0"
seta r_ext_max_anisotropy "16"
seta cg_shadows "1"
seta s_khz "44"
seta s_mixahead "0.2"
seta s_mixPreStep "0.05"
seta s_soundpoolmegs "32"
seta m_filter "0"
seta use_ff "0"
seta r_primitives "2"
seta r_simpleMipMaps "1"
seta r_subdivisions "4"
seta r_depthbits "32"
seta r_ext_multitexture "1"
seta r_ext_texture_env_add "0"
seta r_finish "1"
seta in_mouse "-1"
seta cg_dynamiccrosshair "0"

NOTE:
the commands
seta r_textureMode "GL_NEAREST_MIPMAP_NEAREST"
gives a Software Rendered "pixelated" look but can cause aliasing in the distance

seta r_textureMode "GL_LINEAR_MIPMAP_NEAREST"
Applies Bi-linear filtering to textures but breaks the sky textures unless using 4:3 resolutions

seta r_textureMode "GL_LINEAR_MIPMAP_LINEAR"
Applies Tri-linear filtering to textures but breaks the sky textures unless using 4:3 resolutions

seta r_textureMode "GL_NEAREST_MIPMAP_LINEAR"
this is the best option imo as you get the sharpness in textures up close of the first command but also applies filtering to mipmaps which reduces the aliasing, also has the added benefit of not breaking the sky textures

NOTE:
Anisotropic Filtering is disabled above, if you want it enabled change
seta r_ext_texture_filter_anisotropic "0"
to
seta r_ext_texture_filter_anisotropic "1"
personally i think it looks better disabled but thats purely based on my distaste for filtered textures on older games

NOTE:
Additive Blending in Multitexturing is disabled above, if you want it enabled change
seta r_ext_texture_env_add "0"
to
seta r_ext_texture_env_add "1"
again i think it looks better disabled as its another filter for textures but its only a personal preference of mine

I use the following for a 120hz 2560x1440 16:9 display, change yours accordingly, its usually a good idea to have these lines at the bottom of the list


seta com_maxfps "85"
seta r_customwidth "2560"
seta r_customheight "1440"
seta r_mode "-1"
vid_restart

NOTE
changing the maxfps above or below 85 will affect the physics in the game, alot of people prefer 125 as it allows you to jump further/higher but i prefer to play the way the devs intended (again a personal preference)

FOV is a personal preference but the game uses a default of 80 based off of a horizontal degree 4:3 aspect ratio, ive added how this will scale to different aspect ratios

4:3
seta cg_fov "80"

16:10
seta cg_fov "90"

16:9
seta cg_fov "96"

21:9
seta cg_fov "112"

NOTE: enter the chosen line above your resolution commands in the autoexec.cfg file or it may not work

to fix the cropped weapons while using a 16:9 resolution the following must be entered into the console manually, to enter the console hold SHIFT then ` (tilde key next to 1) this cant be added into the .cfg file as it doesnt work on new games & can cause issues with cutscenes crashing

helpusobi "1"
seta cg_gunx "3"
seta cg_guny "-1"

not sure if this also works for 21:9 or 16:10 resolutions as it may require adjusting

NOTE: the "helpusobi" command is to enable cheats & may not work on multiplayer servers

if all this seems like too much trouble, you can simply go to PCgamingWiki & read the instructions for the game there as they have a few different methods for fixing the gun fov

If you have a Creative Labs EAX surround sound setup.

seta s_UseOpenAL "1"

Here is a video demonstrating how the game looks

Here is a few screenshots