sys_spec_shading = 3
sys_spec_gameeffects = 3
sys_spec_objectdetail = 3
sys_spec_particles = 3
sys_spec_physics = 3
sys_spec_postprocessing = 3
sys_spec_shadows = 3
sys_spec_sound = 3
sys_spec_texture = 3
sys_spec_water = 3
g_skipIntro = 1
cl_fov = 80
pl_movement.power_sprint_targetFov = 80
i_mouse_accel = 0
i_mouse_accel_max = 100
i_mouse_smooth = 0
r_motionblur = 2
g_radialBlur = 1
cl_zoomToggle = 1
r_UseEdgeAA = 3
r_TexMaxAnisotropy = 16
r_PostMSAA = 2
cl_crouchtoggle = 1
r_ColorGrading = 1
r_SSAO = 4
r_VSync = 0
e_shadows = 1
g_enableInitialLoginScreen = 0
r_HDRBloomMul = 1
r_HDRBrightLevel = 1
r_MultiGPU = 0
g_useHitSoundFeedback = 1
sys_MaxFps = 60
r_DrawNearFoV = 80

Just make a new file, call it autoexec.cfg and place it in your Electronig Arts -> Crytek -> Crysis 2 folder (the main Crysis 2 folder)

Notes:
- It's not illegal or anything to do this, but if something happens to your account I cannot be held responsible.
- change r_MultiGPU = 0 to 1 if you have more than 1 graphics card
- tweak the settings yourself to your liking
- cl_fov, pl_movement.power_sprint_targetFov and r_DrawNearFoV are capped at 80 degrees to avoid abuse of the function
- if you want even more control over your config, you can use this website to make your own autoexec.cfg file online and have 184 cvars to tweak: here (Credits to KillerSneak!)
- Oneirohero told me you don't have to use a =, but that you can just use commands like "cl_fov 80". Haven't tested it myself, and not sure if I should even point it out, but here you go.