Not sure the best way to work this into the wiki page, thought I would leave it here for ppl though, google has it buried pretty deeply. This will most likely be useful for other Ubisoft games in the future using a similar engine to FC3.
Requires usage of Rick's Far Cry 3 unpacker/packer to edit "farcry3 install\data_win32\common.dat":
http://farcry3-mods.wikia.com/wiki/Tools_for_Unpack_and_Pack_game_content
inputactionmapcommon.xml (found in Common.dat actionmaps\) in the section:
<ActionMap name="common_look"> <MouseFilter input="mouse:move" curve="Weapons:AimCurves/Mouse_Curve" sensitivity="1.0" maxOutput="10" /> <Binding input="mouse:move" action="update" signal="look"/> </ActionMap>
changing maxOutput="10" to maxOutput="999999" (several occurences under mouse, a few under pad) removes the negative acceleration/dampening with quick mouse movements.