Behind this clickybaity headline is a couple of real questions.
Having seen long videos and guides, but these lengthy explanations don't seem necessary.
I just downloaded the two hard disks from a certain archive, unpacked the multiple ZIP files with The Unarchiver, copied them over (except the boot files), and everything worked.
No need to install keyboard and mouse drivers or type in anything - just plug & play. Played DOOM in full screen, no slowdowns.
Big up to Mr. Flynn for the work with the pack.
QUESTION:
In the "MiSTer AO486 Top 300 DOS Games Pack" there are the two hard disks, the boot/DOS and the Top 300 games.
Besides that, there is an "ADDOS" folder and a "trident_VGA 640x480x16.bin" file.
What are these folders and files, why do you use them, how, and where do they go exactly?