


I'm going to install Winrar, use this, uninstall Winrar. supposedly they have this on a context menu. What I read is that I can use a command line argument on 7zip to make this work but for some unknown reason didn't worked out for me.

Merge the two sets (copy both to the same directory, allow windows to overwrite all the same name files) Unzip EVERY game of the MAME Romset upgrade 0.177 -> 0.178 using the same method described above. (This is a very simple "drag with right click, select 7zip> unzip to \.*") Unzip EVERY game of the Romset, each to one folder. Looking for a way to do this in a full batch this can it be a problem. I unzipped the rom, added just the ddsom.key, re-zipped the rom and bingo! it was working. Tested one game, Dungeons and Dragons - Shadow over Mystara. I'm still to find a comprehensive way to upgrade all the games of the Romset. Got the MAME Romset upgrade 0.177 -> 0.178. Since that's just me on this topic, let me at least register my findings so the next can make use of.
