kAoS

Go to your UT3 demo installation folder.
default: Program Files/Unreal Tournament 3 Demo/

Go into UTGame/Config
Here you will find the default ini files. Since the demo refuses to load the normal inis in the My Documents folder, I found that it loads these ones instead. However, they are all write-protected as they have read-only atributes. So, right click each ones(or the one you need)-->Properties and uncheck "read-only". Now you can edit them. Most are self-explanatory although if you need help, look for the ini topics on this forum.

Open DefaultCompat.ini and start changing things to the way you would want them. Then save and rput the "read-only" atribute back.

Now launch UT3 Demo. It will say that the inis are outdated and offer to update them (saving changes). Click YES. After this it should load up the settings you just specified.

type giveweapon utgame.utweap_instagibrifle in console,

then I had to type loaded and scroll through all the weapons.

Here are the settings that need to be changed;

in UTInput.ini:

[Engine.PlayerInput]
LookRightScale=0.000000
LookUpScale=0.000000
bEnableMouseSmoothing=False
...
Bindings=(Name="MouseX",Command="Count bXAxis | Axis aMouseX Speed=2.0",Control=False,Shift=False,Alt=False)
Bindings=(Name="MouseY",Command="Count bYAxis | Axis aMouseY Speed=2.0",Control=False,Shift=False,Alt=False)
...
Bindings=(Name="LookUp",Command="Axis aLookUp Speed=+25.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
Bindings=(Name="LookDown",Command="Axis aLookUp Speed=-25.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
...
Bindings=(Name="GBA_TurnLeft",Command="Axis aBaseX Speed=-40.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
Bindings=(Name="GBA_TurnRight",Command="Axis aBaseX Speed=+40.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)



[UTGame.UTPlayerInput] <- same thing in this section as playerinput.
LookRightScale=0.000000
LookUpScale=0.000000
...
Bindings=(Name="MouseX",Command="Count bXAxis | Axis aMouseX Speed=2.0",Control=False,Shift=False,Alt=False)
Bindings=(Name="MouseY",Command="Count bYAxis | Axis aMouseY Speed=2.0",Control=False,Shift=False,Alt=False)
...
Bindings=(Name="LookUp",Command="Axis aLookUp Speed=+25.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
Bindings=(Name="LookDown",Command="Axis aLookUp Speed=-25.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
...
Bindings=(Name="GBA_TurnLeft",Command="Axis aBaseX Speed=-40.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)
Bindings=(Name="GBA_TurnRight",Command="Axis aBaseX Speed=+40.0 AbsoluteAxis=0",Control=False,Shift=False,Alt=False)





Adjust your MouseSensitivity according to your preference and what feels right in game with this console command;

set Engine.PlayerInput MouseSensitivity <x>