PsionLX-themed GPE for the Psion netBook Pro -- CF card install
===============================================================
An overlay that applies the recovered Psion user interface to the
working GPE root filesystem for the netBook Pro.

WHAT THIS IS
  The genuine Psion theme, session, help and tutorial files, recovered
  from Psion's own OpenEmbedded build tree, applied on top of a GPE
  rootfs that is known to boot on this machine.

  It is NOT the original PsionLX rootfs. Two components of that system
  exist only in Psion's private CVS (cvs.psiondev.com, dead):
      gpe-appmgr     the launcher grid  -> matchbox-desktop substitutes
      gpe-buttonbox  the button bar     -> mb-applet-launcher substitutes
  Everything else here is Psion's own files, unmodified.

WHAT YOU NEED
  gpe-fs-cf.tar.bz2    the base root filesystem   (included, 14 MB)
  nBkProOs.img_cf      kernel + initrd            (included, 3.5 MB)
  psionlx-overlay.tar.gz  this overlay

INSTALL (on a Linux machine, as root -- macOS will not preserve
         permissions, ownership or device nodes)

  1. Partition the CF card with one Linux (ext2) partition.
        mkfs.ext2 /dev/sdX1
  2. Mount it and unpack the base filesystem:
        mount /dev/sdX1 /mnt
        tar -xjf gpe-fs-cf.tar.bz2 -C /mnt
  3. Apply this overlay on top:
        tar -xzf psionlx-overlay.tar.gz -C /mnt
  4. Point the GTK theme at the Psion theme (the overlay already ships
     etc/gpe/xsettings-default.d/psion-xsettings, which sets
     Net/ThemeName:S:psion -- verify it is being read, and if the image
     uses etc/gpe/xsettings.default instead, change the line
        Net/ThemeName:S:Angelistic
     to
        Net/ThemeName:S:psion
  5. Copy the kernel to the CF card root, named exactly:
        cp nBkProOs.img_cf /mnt/nBkProOs.img
  6. umount /mnt, put the card in the netBook Pro, and boot.

WHAT YOU SHOULD SEE
  The Psion GTK theme and Matchbox window decorations, a 48-pixel panel
  along the bottom in the PsionLX position, and launcher buttons for the
  applications that exist in this rootfs:
      Calculator     gpe-calculator
      Sketch Pad     gpe-sketchbook
      Text Editor    gpe-edit
      Calendar       gpe-calendar
      Contacts       gpe-contacts
      To-do list     gpe-todo
      Image Viewer   gpe-gallery
  with the clock and battery applets at the right, as Psion's own
  psion.mbdock specified.

NOT PRESENT (they were never in this rootfs)
  Word (abiword), Sheet (gnumeric), Email (balsa), Web (firefox),
  Instant Messenger (gaim), Internet Dialler (gkdial), Remote Desktop
  (grdesktop), My Network (linneighborhood), PDF Viewer (gpdf),
  Media Player (totem), Solitaire, Files (gpe-filemanager), Terminal.

  Note: abiword IS present in the other recovered image,
  anonymous-linuxtogo/gpe-image.jffs2 (22.8 MB), which is a NAND image
  rather than a CF filesystem.

WARNING
  netbook-booting.txt states the LX prototype partitions NAND with
      nand -ignore erase 18 ee8 ; nand partition e8
  while a standard netBook Pro needs 7e8 instead of e8. This CF install
  does not touch NAND, so your Windows CE installation is untouched and
  the machine boots CE normally with the card removed.