You should be fine just overwriting with different mod, uninstalling might brick the system.
You can however overwrite all IOS, BC, MIOS and system menu by reïnstalling all of these using your installer.
This will overwrite everything that's...
About everything there is to know about the snes is: https://wiki.superfamicom.org/
Then there is https://github.com/snesrev?tab=repositories who reimplemented 3 snesroms to pc code.
The system is a modified µ-controller, about all games are...
Absolutely, i can't buy an Xbox360 new in any store.
(Maybe i can still buy a never opened xbox360 gift somewhere, but not new.)
The games look pixelated on my 16kHD TV, framerate are not up to standard...
I think even Micro$oft thinks it's retro...
Maybe @Technicmaster0 is right with: I don't think that any ds games used battery backed sram saves.
I don't know the DS cartridges from inside, i thought they used the same tech as most other cartridge consoles.
On the console side i'm sure...