A "repack" for PC usually reduces file size from 100GB to 40GB by removing 4K videos or unused languages. For PSP:
If a website offers a "Hitman 3 PSP Repack" that is 200MB, it is either: hitman 3 ppsspp iso file download android isoroms repack
Go to the Google Play Store.
This is the closest you will get to a console Hitman experience on a PSP emulator. A "repack" for PC usually reduces file size