: Enthusiasts use RPKG structures to repackage system apps, themes, and "hacked" components that allow for the installation of unsigned applications.

For those entrenched in the Symbian modding scene, (Redistribution Package) refers to a specific archive format used to store and flash firmware components (ROM, ROFS, and Core) onto Nokia devices. Unlike standard firmware updates pushed via Nokia Software Updater (NSU) in the past, an "RPKG Exclusive" usually signifies a specific, often rare or modified firmware dump that has been preserved and packaged for manual flashing.

The N95’s ROM exclusivity was enforced by a locked bootloader and certificate checks. But the community fought back with (Secondary Program Loader). By flashing a hacked bootloader, users could bypass the RPKG signature check entirely, allowing them to write directly to the NAND ROM. This act—voiding the warranty—was the only way to install custom firmwares (like the legendary "Nokia N95 8GB V35 Cooked ROM") that removed the exclusive gates.