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+This fwlzw (de)compressor originally came from the FFMPEG project and was modified by Broadcom for
+(de)compressing device configuration files.
+
+In the Zyxel/MitraStar/Broadcom source-code packages provided by those companies there is a tool
+that runs on the host for compression only:
+
+hostTools/CompressConfig
+
+That tool includes the FFMPEG library code but does NOT provide its own source-code, as it should
+since the files are licensed on the terms of the GNU GPL.
+
+I've copied the files from the Zyxel source-code distribution as the basis of this host-based executable tool:
+
+ cp Zyxel/source/userspace/public/libs/cms_util/lzw*.c .
+ cp Zyxel/source/userspace/public/include/cms_lzw.h .
+
+With this tool it is possible to extract the payload from a firmware file. It is typically the second
+payload image in the file - the first being the CFE/Kernel/root file-system combination.
+
+My fwheader tool can report the location and size of the payloads in the firmware file. Those values can
+then be used to extract the payload to a file, which can be passed to this fwlzw tool.