Question about adding homebrew Rom's to an emulator

[volzzilla]

Found a few websites that include homebrew games, game hacks, and unreleased prototypes for a few platforms (mostly Atari) and was wondering if after being downloaded and placed into the ROM list for an emulator on the XBox, if the game will work as intended, or does each game require certain coding after being put in an emulator?

[Devia Eleven]

Hacks do work on the systems/emulators they were created for.