Is there a mod that already does this?

Here is the script that adds it in. (I think)

;Sprint script created by Michael Justice, 12/18/08Scriptname SprintScriptshort setOnceshort msgOnce;Sprint variablesfloat sprintSpeedshort healOnce;AP drain variablesfloat apTickfloat apTimer;Sound variablesfloat breatheTimershort isAPLowshort isBreathing;View bob variablesfloat shakeTimerref explosionRef;FOV variablesfloat defaultFOVfloat default1stPersonFOVshort FOVChangefloat currentFOVfloat FOVIncrease;Controlsshort sneakKeyfloat sensitivityshort reSneakshort reEqpWepfloat reEqpWepTimershort reWalkBegin GameMode;Set controlsif(SprintSettings.customKey == 0)	if(getControl 9 != -1)		set SprintSettings.runKey to getControl 9	elseif(isKeyPressed SprintSettings.runKey == 0)		setControl 9 SprintSettings.runKey	endifendif;Add menu itemif(player.getItemCount sprintMenuArmor < 1)	player.addItem sprintMenuArmor 1endif;Soundsif(SprintSettings.isSprinting == 1 && SprintSettings.breathingSound == 1)	if(isBreathing == 0 && player.getav actionPoints < player.getbaseav actionPoints / 4 && breatheTimer <= 0)		set isBreathing to 1	endifendifif(breatheTimer > 0)	set breatheTimer to breatheTimer - getSecondsPassedelse	if(isBreathing == 1)		if(player.getav actionPoints < player.getbaseav actionPoints / 4)			if(GetPCIssix Male == 1)				playSound SprintBreatheLoop			else				playSound SprintFemaleBreatheLoop			endif			set breatheTimer to 8		else			if(GetPCIssix Male == 1)				playSound SprintBreatheEnd			else				playSound SprintFemaleBreatheEnd			endif			set isBreathing to 0			set breatheTimer to 10		endif	endifendif;Triggers a HUD shudder regularly while sprintingif(SprintSettings.isSprinting == 1 && shakeTimer < 0 && SprintSettings.headBob == 1)	set explosionRef to player.placeAtMe SprintExplosion		explosionRef.disable	explosionRef.markForDelete		set shakeTimer to 1endifif(shakeTimer >= 0)	set shakeTimer to shakeTimer - getSecondsPassedendif;Damage the player's action points every 1/10 seconds if they're sprintingset apTick to (25 - player.getav endurance) * SprintAPMultif(SprintSettings.isSprinting == 1 && apTimer < 0)	set apTick to apTick / 10	player.Damageav ActionPoints apTick	set apTimer to 0.1endifif(SprintSettings.isSprinting == 1 && apTimer >= 0)	set apTimer to apTimer - getSecondsPassedendif;Repairs the damage we did to the player's legif(healOnce == 1)	player.Restoreav LeftMobilityCondition 1	set healOnce to 0endif;Smoothly widens or narrows the FOV as necessaryif(FOVChange == 1)	set currentFOV to currentFOV + 1	con_SetCameraFOV currentFOV	if(currentFOV >= defaultFOV + FOVIncrease)		set FOVChange to 0	endifSetNumericIniSetting "fdefault1stpersonfov:display" default1stPersonFOV ;Changing the FOV also changes this, so we need to change it back to its defaultendifelseif(FOVChange == -1)	set currentFOV to currentFOV - 1	con_SetCameraFOV currentFOV	if(currentFOV <= defaultFOV)		set FOVChange to 0	endifSetNumericIniSetting "fdefault1stpersonfov:display" default1stPersonFOVendif;Tries to make sure the player's weapon gets re-equipped if they stop sprinting while the weapon is still being put awayif(SprintSettings.isSprinting == 0 && reEqpWep == 1 && reEqpWepTimer > 0)	set reEqpWepTimer to reEqpWepTimer - getSecondsPassedendifif(SprintSettings.weaponsOut == 0 && reEqpWep == 1 && reEqpWepTimer <= 0)	tapControl 4	set reEqpWep to 0endif;Forces the player into run mode if necessaryif(SprintSettings.isSprinting == 1 && player.isRunning == 0)	tapControl 10	set reWalk to 1endifif(SprintSettings.isSprinting == 0 && reWalk == 1)	tapControl 10	set reWalk to 0endif;Counts down timeoutif(SprintSettings.timeOut >= 0)	set SprintSettings.timeOut to SprintSettings.timeOut - getSecondsPassedendif;Prevents sprinting right after firing or aiming a weaponif(SprintSettings.isSprinting == 0) 	if(isControlPressed 6 == 1)		set SprintSettings.timeOut to 0.5	endif	if(isControlPressed 4 == 1)		set SprintSettings.timeOut to 1	endifendif;Prevents inadvertant walkingif(player.getav actionpoints < apTick || SprintSettings.timeOut > 0)	disableControl 9else	enableControl 9endif	;Begins the sprintif(SprintSettings.isSprinting == 0 && isKeyPressed SprintSettings.runKey == 1 && player.IsMoving == 1 && player.getav ActionPoints > apTick && player.getav LeftMobilityCondition > 0 && player.getav RightMobilityCondition > 0 && player.IsSwimming == 0 && player.getav InventoryWeight <= player.getav CarryWeight && IsControlPressed 6 == 0 && SprintSettings.timeOut < 0 && getPlayerControlsDisabled 1 0 1 0 1 0 0 == 0)	set SprintSettings.isSprinting to 1	if(SprintSettings.customKey == 0)		setControl 9 -1	endif	if(SprintSettings.allowStrafe == 0)		disableControl 2 ;Disables left and right strafe		disableControl 3	endif		set sprintSpeed to (player.getav agility * 4 + 40 * (1 - player.getav inventoryWeight / player.getav carryWeight)) * SprintSpeedMult	player.modav SpeedMult sprintSpeed		if(SprintSettings.FOVChangeOn == 1)		if(FOVChange == 0)			set defaultFOV to GetNumericIniSetting "fDefaultWorldFOV:display"			set default1stPersonFOV to GetNumericIniSetting "fDefault1stPersonFOV:display"		endif		set FOVChange to 1		set currentFOV to defaultFOV		set FOVIncrease to sprintSpeed / 10	endif	player.Damageav LeftMobilityCondition 1 ;Damages the player's leg in order to force the game to reevaluate the player's speed	set healOnce to 1	if(player.IsWeaponOut == 1) ;If the player had their weapon out, remember to re-equip it later		set reEqpWep to 1		set reEqpWepTimer to 0.7	endif	if(player.isSneaking == 1) ;If the player was sneaking, remember to go back to sneaking later		set reSneak to 1	endif	if(SprintSettings.weaponsOut == 0)		DisablePlayerControls 0 0 1 0 0 0 1	else		DisablePlayerControls 0 0 0 0 0 0 1	endif	if(SprintSettings.turnRad > 1)		set sensitivity to getNumericIniSetting "fMouseSensitivity:controls" 			set sensitivity to sensitivity / SprintSettings.turnRad		setNumericIniSetting "fMouseSensitivity:controls" sensitivity	;increases turning radius	endif	if(SprintSettings.blur == 1)		iMod SprintBlur	endifendif;Ends the sprintif(SprintSettings.isSprinting == 1 && (player.IsMoving == 0 || IsKeyPressed SprintSettings.runKey == 0 || player.getav ActionPoints < apTick / 10 || player.IsSwimming == 1 || player.getav LeftMobilityCondition <= 0 || player.getav RightMobilityCondition <= 0 || player.getav InventoryWeight > player.getav CarryWeight || IsControlPressed 6 == 1 || SprintSettings.timeOut > 0 || getPlayerControlsDisabled 1 0 0 0 1 0 0 == 1))		set SprintSettings.isSprinting to 0		if(SprintSettings.allowStrafe == 0)			enableControl 2			enableControl 3		endif		set sprintSpeed to sprintSpeed  * -1		player.modav SpeedMult sprintSpeed		if(SprintSettings.FOVChangeOn == 1)			set FOVChange to -1		endif				player.Damageav LeftMobilityCondition 1		set healOnce to 1		EnablePlayerControls 0 0 1 0 0 0 1		if(reEqpWep == 1 && SprintSettings.weaponsOut == 0) ;Re-equip the player's weapon if they had it out before the sprint			TapControl 4		endif		if(reSneak == 1) ;Goes back to sneaking if necessary			tapControl 8				set reSneak to 0		endif		if(SprintSettings.turnRad > 1)			set sensitivity to sensitivity * SprintSettings.turnRad			setNumericIniSetting "fMouseSensitivity:controls" sensitivity ;Returns the turning radius to normal		endif		if(SprintSettings.blur == 1)			riMod SprintBlur		endif		set SprintSettings.timeOut to 1endif;ShowMessage SprintDebugMessage, SprintFOSEVersionEnd

I think it's this line:

;Add menu itemif(player.getItemCount sprintMenuArmor < 1)	player.addItem sprintMenuArmor 1endif

But when I delete that I get an error that apparently always existed, because I tried to save without even editing it and got an error saying setControl not found.
Is there a way to save while getting an error? Because when I press yes to save, it stays in the script and won't save.