|Well, that sure confused me: I don't know what FED is (maybe later I'll try the GOO).|
You never said what you wanted done with the output, or what form the output is to take, so I'll just leave that for future resolution.
I made this to try and handle the lowest level of your problem:
::===== snippet ONLY, for testing prototype filtration of input file
@echo off & setlocal enabledelayedexpansion
:: leaving all the debugging junk in play for obvious reasons!
for /f "tokens=*" %%a in ('findstr /R "^A.*"^<nahek') do (
echo comparing: [!test!] -- [!test2!]
if "!test2!" neq "!test!" echo NINE %%a
::====== end snippet
Step one: conquer one single, unzipped file. Then you go from there with unzipping and directory recursion, meantime always watching for those exceptions which always seem to crop up in forums.