I agree it's simple, but guides should be written with the assumption that the user knows nothing about anything (as I've demonstrated myself).
For example, when you download the volumes, your directory is going to have directories named "eXoDOSSTR, eXoDOSSIM", etc.
These are meaningless of course, since you need to combine all the volumes in order for the bat to decompress everything needed.
I would write something like:
"the root directory should have 5 metadata zip files (1 from each volume), as well as the launchbox zip file, the setup.bat, and a folder named eXoDOS.
In that folder there should be two folders: "Games", with the games from all 5 volumes, and "util", with unzip.exe and util.zip".
Just to make thing unambiguous.
I only have 1 volume left to download, and I still wonder how transferring the xml files to my instance of launchbox works, seeing as you said the program uses relative paths, and my instance of launchbox won't be in the same relative path as the instance that's provided, but I'll figure that out when I get there.
Thanks for your help and effort!