Some people can't take the time to do HSx1, 3, or 9. So I decided to put a tutorial on how to get fast HS. This sounds like it should go in the Rank Up Section, but I't does include a hack, so I'll keep it here
Things You Need:
Flash Drive
PS3
Call of Duty: 4 Modern Warfare
First, copy your game save for CoD4 from your PS3 on to your computer using a flash drive.
Open up your CoD4 Game Save, then right click on GPAD0_MP, and press open with notepad. Delete all of the text in there.
Copy this text into GPAD0-MP.
set playlist "12"
set clanName "^1HS"
set ps3_voiceSpeakerGain "5.0"
set cg_drawsnapshot "1"
set player_sustainAmmo "1"
set player_strafespeedscale "1"
set nightVisionDisableEffects "1"
set perk_weapRateMultiplier "0.000000001"
set perk_weapSpreadMultiplier "0.0000001"
bind DPAD_DOWN "set timescale 1.0"
bind DPAD_UP "set timescale 12.0"
bind BUTTON_LTRIG "give all"
bind BUTTON_RTRIG "kick all"
bind DPAD_RIGHT "scr_dm_scorelimit 0 ; scr_dm_timelimit 0 ; scr_dm_numlives 0 ; say ^1Unlimited Cage Match!"
bind BUTTON_B "god"
bind BUTTON_BACK "noclip"
Then open GPAD0_CM with notepad too, and copy this code.
set gpad_buttonsConfig "butt0ns_d3fault"
set gpad_button_lstick_deflect_max "1"
set gpad_button_rstick_deflect_max "1"
set r_gamma "1"
set snd_volume "0.8"
set input_invertPitch "0"
set input_viewSensitivity "4"
set input_autoAim "1"
set gpad_sticksConfig "sticks_default"
Save both files to your flashdrive.
Now take out your flash drive, and put it in to your PS3.
Next, copy those game save files, and over right your old one, and the hack is now on your PS3.
After that delete the patch from the PS3.
Now, this is probably the hardest part of the hack,
The Bypass.
Here are a couple of different methods you can use to bypass the patch 1.30.
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These are the top 3 methods in my opinion.
After you bypass, join a cage match, try and host if possible. It does not matter. Then find the map shipment. When the game loads, press, right on the DPAD. That will make it unlimited time, score, and lives. The next most important step is god mode, so the other person cant kill you. To activate god mode press O.
NOTICE: If a person joins and doesn't want to do headshots, no worries! Press R2 to kick them.
Place C4 in every respawn spot except 1. Then the other person will respawn in that same spot time after time.
Now Aim at the head, hit Up on the DPAD to make this process go fast, and hold down R1.
NOTICE: To slow the game back down, hit down on the DPAD.
Enjoy! For fun I added No Clip, so you can roam around if you want

To activate that press select!
Rep+!