Replace Window Manager

OpenBox, the default window manager of LXDE, can be easily replaced by any one you like, such as fvwm, icewm, dwm and awesome... etc..

The window manager LXDE will attempt to use is defined this file:

/etc/xdg/lxsession/LXDE/config

Per default this is defined as

[Session]
window_manager=openbox-lxde

Replace openbox-lxde with the window manager of your choice.

It might be also worth looking at:

/etc/xdg/lxsession/LXDE/default

These default settings however appear to be deprecated, as there is this note in the file:

! This file is kept for backward compatibility.
! Only used by obsolete lxsession, not lxsession-lite.

Anyhow, for example, somebody's /etc/xdg/lxsession/LXDE/default looks like this:

smproxy
openbox
lxpanel

smproxy is a program provided in xorg. It provides session management support for programs which don't know X11 R6 session management protocol. It is highly recommended you include this line in your desktop.