A lot of people have had trouble, so I'm posting my http://www.glovepie.org/ script. Even if you don't like this one, it's customizable and helps you with a couple things:

• Enhances mouse sensitivity across menus
  
• Moves the left side of the keyboard to the right

If you want an even faster mouse, just increase the sensitivity variable below. I know we still have some issues related to quickly switching between melee and magic setups (I want a quick switch option! I can't believe we don't have one...), but this helps a little bit I think.

----------
Keyboard.Tab = keyboard.Apostrophe
Keyboard.Escape = keyboard.BackSpace+keyboard.
Keyboard.A = keyboard.LeftBracket
keyboard.D = keyboard.RightBracket
Keyboard.r = keyboard.Comma


if Keyboard.Left then
mouse.DirectInputX = mouse.DirectInputX - 7
End If

if Keyboard.Right then
mouse.DirectInputX = mouse.DirectInputX + 7
End If


If var.x then {

} else {
var.x=mouse.x;
}
end if

If var.y then {

} else {
var.y=Mouse.CursorPosY;
}
end if

If var.sensitivity then {

} else {
var.sensitivity=3;
}
end if

If Mouse.CursorPosY < var.y then
Mouse.directinputy = mouse.directinputy - var.sensitivity
var.y = Mouse.CursorPosY
end if

If Mouse.CursorPosY > var.y then
Mouse.directinputy = mouse.directinputy + var.sensitivity
var.y = Mouse.CursorPosY
end if

If Mouse.CursorPosx < var.x then
Mouse.directinputx = mouse.directinputx - var.sensitivity
var.x = Mouse.CursorPosx
end if

If Mouse.CursorPosx > var.x then
Mouse.directinputx = mouse.directinputx + var.sensitivity
var.x = Mouse.CursorPosx
end if