See how everything sits inside the folder
Once you have everything in the Arcade folder, load the ARCADE.EXE
Once loaded click on OPTIONS TAB > Interface Settings > Tick Enable Faster Audit of all games method AND ENABLE Scan of 7z Archives.
In the "Display INFO on TAB" box select "ALL"
Press OK.
Now click on VIEW Tab > Show Pictures > Untick INFO
CLOSE MAME !
Reload it then press CTRL+A To audit the roms (Default paths are basically inside the ARCADE folder)
Make Tea
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Once the audit is done you'll see a box with some text in saying missing correct etc... Ignore this
Click OK
NOW On the LEFT Panel of the ARCADE Emulator you'll see text, look for "WORKING" and CLICK IT
CLOSE Arcade
Reload Arcade
Select a game and load it
Everything* listed in the WORKING cat is flagged as Working by MAMEDev, these are the games you have
*However, a handful of games refuse to load due to them not being spotted as broken.... Midnight Run is one of them.
The roms are still included. Any game listed now in the WORKING Cat not found is gonna be a CHD file (Large HDD Images)
If you want the CHD's Go to here >>