These are designed to be used with dashboards like Evolution-X or XBMC to display and launch games directly from the HDD.
The best archives don't just include games. They include: Xbox Hdd Ready Archive
This format is the gold standard for playing games from a modded Xbox’s hard drive because it saves space, eliminates disc swapping, and works with all dashboard loaders (Evox, UnleashX, XBMC). These are designed to be used with dashboards
XBOX HDD READY (PAL-JPN) : Regional versions for PAL and Japanese consoles. How to Use These Files eliminates disc swapping
I'm on it.