[DONE]  To Do:

[*]     Identify files that were removed

        mozilla/modules/libmng/mng
        mozilla/modules/libpr0n/decoders/mng
        mozilla/modules/libimg/macbuild/mng  (no longer needed)
        
[*]     Identify files that were changed (refer to removal patch)

        mozilla/modules/libpr0n/build/Makefile.in
        mozilla/modules/libpr0n/src/imgLoader.cpp
        mozilla/configure.in
        mozilla/allmakefiles.sh
        mozilla/build/unix/modules.mk
        mozilla/config/autoconf.mk.in
        mozilla/config/module2dir.pl
        mozilla/config/static-config.mk
        mozilla/embedding/browser/gtk/src/Makefile.in
        mozilla/embedding/browser/photon/src/Makefile.in
        mozilla/embedding/config/gre-installer-win.pkg   
        mozilla/embedding/config/gre-win
        mozilla/modules/libimg/Makefile.in
        mozilla/modules/libpref/src/init/all.js
        mozilla/xpinstall/packager/packages-os2
        mozilla/xpinstall/packager/packages-unix
        mozilla/xpinstall/packager/build/win/mozilla/XPI_JSTs/browser.jst
        mozilla/xpinstall/packager/os2/browser.jst
        mozilla/xpinstall/packager/unix/browser.jst
        mozilla/xpfe/components/build/nsModule.cpp
        
[*]     Create mngzilla directory, with structure

        mngzilla
           README.txt    (installation instructions)
           TODO.txt      (this file)
           ChangeLog.txt (change log)
           mozilla-1.4.1 (contains files that were removed in MNG removal)
           mozilla-1.5   (contains files that were changed in MNG removal)
           mozilla       (updated files for use in MNG-supporting mozilla)
           patches       (directory of patches)
           
[*]     Install this TODO.txt in mngzilla directory
[*]     Write and install README.txt
[*]     Write and install ChangeLog.txt
[*]     Import files that were removed, into mozilla-1.4.1
[*]     Import files that were changed, into mozilla-1.5
[*]     Copy removed files from mozilla-1.4.1 into mozilla
[*]     Copy changed files from mozilla-1.5 into mozilla
[*]     Import libmng-1.0.6 *.c and *.h files from libmng CVS, into mozilla.
[*]     Move mozlibmngconf.h from "special" directory into mng directory.
[*]     Make inclusion of mozlibmngconf.h in libmng_conf.h unconditional.
[ ]     Make note of above change in mng/MOZCHANGES

[*]     Initialize CVS with the mngzilla directory.

[*]     Revise mozilla/modules/libimg/mng/Makefile.in to add mozlibmngconf.h
        to the EXPORTS list.

[*]     Update files (use MNG restoration patch from bug #18574)
  [*]   mozilla/modules/libpr0n/build/Makefile.in
  [*]   mozilla/modules/libpr0n/src/imgLoader.cpp
  [*]   mozilla/config/autoconf.mk.in
  [*]   mozilla/config/static-config.mk
  [*]   mozilla/embedding/browser/gtk/src/Makefile.in
  [*]   mozilla/embedding/browser/photon/src/Makefile.in
  [*]   mozilla/embedding/config/gre-installer-win.pkg   
  [*]   mozilla/embedding/config/gre-win
  [*]   mozilla/modules/libimg/Makefile.in
  [*]   mozilla/modules/libpref/src/init/all.js
  [*]   mozilla/xpinstall/packager/packages-os2
  [*]   mozilla/xpinstall/packager/packages-unix
  [*]   mozilla/xpinstall/packager/build/win/mozilla/XPI_JSTs/browser.jst
  [*]   mozilla/xpinstall/packager/os2/browser.jst
  [*]   mozilla/xpinstall/packager/unix/browser.jst
  [*]   mozilla/xpfe/components/build/nsModule.cpp

[*]     Update remaining files manually. Patch fails with these:
          ./mozilla/config/module2dir.pl.rej
          ./mozilla/build/unix/modules.mk.rej
          ./mozilla/configure.in.rej
          ./mozilla/allmakefiles.sh.rej
  [*]   mozilla/config/module2dir.pl  (patch is no longer needed,
        remove file from mozilla and mozilla-1.5 directories)
  [*]   mozilla/build/unix/modules.mk  (long lines -- difficult to edit)
  [*]   mozilla/configure.in 
  [*]   mozilla/allmakefiles.sh
  [ ]   Update mozilla/configure from mozilla/configure.in (Requires
        autoconf-2.12, *not* the current autoconf-2.5x)

[ ]     Revise mozilla/configure.in to make MNG support a configurable
        feature via a "--with-mng" flag.
[ ]     Update mozilla/configure from mozilla/configure.in
[ ]     ...
[ ]     Keep ChangeLog, README, and TODO up to date.
[ ]     Make patch file
[ ]     Make binaries (list platforms)
[ ]     ...