Change the action of a button (IR command)?

[half]

Hi,
When we press a button (IR command), the box performs an action.
How can we change this action, to run a bash script ?

[half]

the “keymap.xml” file

cd /storage/.kodi/userdata/keymaps/
nano keyboard.xml

<keymap>
<global>
	<remote>
		<button_reference>RunScript(script.myscript)</button_reference>
	</remote>
</global>
</keymap>

Question 1) How can I find the “button_reference” (to put in this xml)?

Question 2) Where should I put the script “script.myscript” ?