Well I managed to move forward a bit by finding 2 softwares to do it but the end escapes me a little.
First there is the Darkfalz software called MultipleFileLBACopier.exe. It will allow you to create a script.txt file from a crc32.txt file.
Here's how to start:
- move crc32.exe,MultipleFileLBACopier.exe and newfile.exe to the folder containing the data (we will call it data) of the future game to be burned. Open a back window (cmd.exe), go to the data folder and write : crc32.exe folder1/*.* > folder1.txt
Do the same for the other folders (folder2.txt, ...,foldern.txt)
Finally, open folder1.txt and add at the end the contents of folder2.txt then that of folder3.txt, etc ...
You will have a single file containing the crc32 of all the files in the different folders of our data folder.
Launch the MultipleFileLBACopier.exe software and indicate the path of the crc32 and script files (a relative or absolute path is possible) then click generate. It will create a script.txt file for you containing all the redundant files. It will also create you a zero.bat file which will create empty files of all our identical files (except for one of course which will be the reference file). Launch zero.bat. Then the ISO patch does not seem to work.
So I found another tool that I have not yet fully understood, which can starts from the script that can be generated in MultipleFileLBACopier.exe if I understood correctly.
I am enclosing the 2 software for those who would like to test and find out how to finalize all of this.
For both there is a readme.txt file which gives a lot of information.
I think I'm on the right track but I get stuck on the end