Many forums offer free Nokia 5320 ROMs, but they often fall into the "low quality" trap. Here is what happens with bad files:

: The custom RPKG had replaced the pixelated 2008 icons with sleek, vector-based graphics.

from your list of emulated devices to begin running Symbian apps or N-Gage games. How To Play N-Gage 2.0 Games - EKA2L1 Wiki

Place the RPPlus.exe patch into the auto-start folder of the ROM image to ensure your phone is permanently unlocked after flashing.

: Leo loaded the custom ROM image and the modified RPKG into the flashing tool. He clicked "Reflash" and watched the progress bar slowly creep across the screen.

These are resource patches and package files used by custom ROM developers to inject high-quality modifications directly into the system ROM or memory drives during the build process. Why Opt for an "Extra Quality" Custom Image ROM?