Notice:This anim is customized for Ferrari 150 Italia. Viusal effects may get messy if you use this anim for other F1 mods.
This anim is still experimental.There will be newer releases.
Don't use this anim for releasing your own mod without my permission.
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Noteworthy Features:
realistic hand steering angle(Niko rotates the steering wheel for just 90 degrees and the animation comes to an end)
No more leaning of Niko
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Introduction:
This anim mod is used to correct seating posture of Niko and not to let his legs pass through the cabin in most case. Here "case" means any actions that niko and other peds make when driving the f1 car. Such as:
sit_drive (idling with hands on the steering wheel)
horn (pressing the horn)
keystart (igniting the engine)
etc.

However some actions making by characters aren't editable for exclusive usage to the f1 car because these animations are shared by other cars using veh@low.wad.

Also, you will sometimes find that Niko still seats as the original anim does. In this case you should get out of and enter the car for several more times.
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How to install:
As veh@low_xx_lo1.wad is originally used by the car called Stratum only. So first browse Grand Theft Auto IV/common/data and open vehicles.ide

You should find the following line(if you haven't modified anything of Stratum) 
stratum, 	stratum,	car,		STRATUM,	STRATUM,	VEH@LOW,	VEH@LOW_XX_LO1,		100,	999,		0.2494,	0.2494,		0,	2,	1.0	,1,	ext_sunroof

then replace the data "  VEH@LOW_XX_LO1 " with " NULL ".

Lastly use OpenIV, then browse Grand Theft Auto IV\pc\anim\anim.img\, look for veh@low_xx_lo1.wad and replace it with the new .wad

And that's all for anim installation.