Howto get automount and stuff working in 9.10 Karmic without gdm

When running the gnome desktop without gdm e.g. by startx things does not work as expected. E.g. if a usb disk is plugged in it is not mounted and the err "not authorized" is displayed.

I think the correct solution may be to include ck-launch-session in startx but I have not been able do do this. I still dont really understand exactly how the ubuntu startup scripts works.

EDIT: please note that this does not fix usb automount in xbmc.
The problem can instead be fixed by:

sudo apt-get install policykit-1 devicekit-power

sudo nano /var/lib/polkit-1/localauthority/50-local.d/custom-actions.pkla
add:

[Actions for xbmc user]
Identity=unix-user:xbmc
Action=org.freedesktop.devicekit.disks.*;org.freedesktop.devicekit.power.*;org.freedesktop.consolekit.system.*;org.freedesktop.hal.storage.mount-removable;org.freedesktop.hal.device.volume
ResultActive=yes
ResultAny=auth_admin
ResultInactive=yes