hinto wrote:
This isn't an xrandr question, rather an LXDE one.
Sorry, I can't answer the LXDE question, hopefully someone else will have some insight for you.
The only methods I would be familiar with to accomplish what I think you want, is via xrandr and an xorg.conf, so in my experience/methods of customising desktops/monitors it would be an xrandr/xsession & pcmanfm vs feh & lxpanel question. My bad.