Actually, it's a bit more simple than that: Mount the directory as both a CD and a normal directory.

Thanks to DoxBox, ScummVM, Exult and Wine many classics run perfectly fine under Linux.

I tried to run sega rally championship since years. Windows 98, XP, 7, 8. It always had a weird speed up bug and even missing music, where the game runs to fast for a few seconds and then suddenly it runs normal again.... I installed it on my win 10 laptop and suddenly it works perfect, it even plays the music. I also installed Midnight club 2 on the win 10 laptop. it was always running with 1000 miles per hour........suddenly it works perfect. Then i checked what happened. I have a geforce gtx 960m, but on these two games the laptop defaulted to intel graphics. And if some games still run to fast (like saints row 2) you can use the nvidia inspector to lock the frames (in that case you have to tell the stupid laptop to actually use the nvidia, of course), in the case of saints row 2 i locked the frames to 25fps. It now plays just like the xbox 360 version.

I got a lot of DOS games running.
However, it took a lot of debugging and trial and error...

;)

I still play some (very) old DOS games with my actual config (FX-8350, GTX 1050Ti)
- Project-X (even if this shoot'em up from Team17 is better on my Amiga 500, the PC conversion is still playable and good)
- Terminator Rampage (still on DosBox, even if it has sometimes slowdown on my 8 core AMD CPU)
- Zool (still on DosBox, a great platform game from Gremlin that remembers me the good old days when i was young)...

Oh, this is inspiring, thank you!

I've also got Freelancer working, got a second-hand copy through amazon... And there are instructions on some site that I googled that allowed some fancy graphical extras that the original didn't have. There is even an in-space save patch, though that was a bit tougher to find... not that i need that :P

Sometimes GOG Twitch team gives nice tips as well, much appreciated!

Stoked - Big Air Edition (dvd) also worked after a few hours :) Not a bad snowboarding game.

I used to do a lot tweaking with Amigas, first with the physical computers and later with the emulators...
Though I felt my brain started to melt at some point so I got rid of my copy of AmigaForever :D

Oni (thanks to fan-made mod-launcher).
Future Cop LAPD (thanks to fan-made installer)
Gruntz, Get Medieval, Claw (most of them with dgvoodoo, although with Claw I've tried other stuff, like DXWindower).
Daemon World (first one, entirely in german language, with help of dgvoodoo is going generally fine, but still has some issues).
Sonic Heroes, Sonic Riders (no issues at all, surprisingly, no matter if under Windows 7, Windows 8 or Windows 10).

Various Dos games (Star General, Iron Blood, WH40k: Space Crusade, Alien Rampage before GOG's release) - Dosbox/D-Fend and here we go! Although some of them, like Iron Blood, required to make additionaly working CD image and activating him in dosbox

Many many DOS games in DOSbox. I usually tweak GOG's configurations anyway.

i have no problem getting old games to run. the oldest games i have running are need for speed 2, monkey islands etc. i usually have more problems with old games when gog adds its compatibility tweaks believe it or not.

Never thought of that but my solution works fine even if it maybe takes up a bit more space.

Nice to learn something new, thanks.

Learning to work with directories with a DOSbox launcher GUI does help visualize this a lot.