You don’t need to copy an entire CD image. ScummVM works with extracted game data files. For example, for Monkey Island :
ScummVM is not a traditional emulator that mimics old hardware; instead, it provides a re-implementation of game engines. This allows games from LucasArts, Sierra, and Westwood to run natively on modern handhelds with improved performance and features like graphical upscaling . How to Setup ArkOS ScummVM arkos scummvm
If your handheld has a touchscreen:
While powerful, the Arkos + ScummVM pipeline is not perfect: You don’t need to copy an entire CD image