[Crispy2]

Ok so in summary all you really need to do is the following.

As user xbmc create this empty file.

Code:

vi ~/.xbmc/userdata/keymaps/remote.xml

and paste in the following. In vi hit "i" first to insert text.

Code:

<keymap>
  <global>
    <remote>
      <three>volumeup</three>
      <six>volumedown</six>
      <nine>mute</nine>
    </remote>
  </global>
  <FullscreenVideo>
    <remote>
      <three>volumeup</three>
      <six>volumedown</six>
      <nine>mute</nine>
    </remote>
  </FullscreenVideo>
  <VideoMenu>
    <remote>
      <three>volumeup</three>
      <six>volumedown</six>
      <nine>mute</nine>
    </remote>
  </VideoMenu>
</keymap>

Hit "ESC", then enter ":wq"

Restart xbmc, you will get some behaviour as in the old xbox days