It seems you're looking for a guide to installing and updating the repack by FitGirl, specifically referencing the v1.3.5314 CODEX update.
The is not primarily a tool for piracy in the pejorative sense; rather, it is a mirror reflecting the failures and successes of digital distribution. It succeeds because it solves real problems: bloated file sizes, intrusive DRM, forced updates, and dependency on external servers. It exists because for a segment of the gaming population—those in developing nations, on metered connections, or with a collector’s fear of digital rot—the official product is inaccessible or undesirable. It seems you're looking for a guide to