Cripaktools ((new)) -

But extracting was the easy part. To bring the character back, he had to repack the archive. was his only bridge. He spent weeks carefully translating the text and re-aligning the data. When he finally hit "Repack," he held his breath. If the data alignment or compression was off by even a single byte, the game would crash on startup.

CPK files require strict alignment of data sectors (often aligned to 2048 bytes for CD/DVD sector emulation). CriPakTools automatically handles padding and alignment when repacking, ensuring the modified archive does not crash the game engine. cripaktools

Used primarily in console and portable titles to group data into optimized ID-based chunks. But extracting was the easy part