private.xmlに以下を追記
Fnキーを押してh、j、k、lを押すとカーソル移動イベントになる
<item>
<name>Fn vim</name>
<identifier>private.fnvim</identifier>
<autogen>
__KeyToKey__
KeyCode::K, ModifierFlag::FN,
KeyCode::CURSOR_UP
</autogen>
<autogen>
__KeyToKey__
KeyCode::J, ModifierFlag::FN,
KeyCode::CURSOR_DOWN
</autogen>
<autogen>
__KeyToKey__
KeyCode::H, ModifierFlag::FN,
KeyCode::CURSOR_LEFT
</autogen>
<autogen>
__KeyToKey__
KeyCode::L, ModifierFlag::FN,
KeyCode::CURSOR_RIGHT
</autogen>
</item>