Originally, gamers purchased the game directly from the PlayStation Store on the PSP or PS3. Sony provided an official, perfectly optimized EBOOT file. While the PSP store is effectively closed for direct new purchases, users who previously bought it can still download it from their transaction history.
A PSP EBOOT is a digital file format used by the PlayStation Portable. The Basics
You get the full, uncompromised 1996 platforming experience on the go.
Here is a comprehensive guide to understanding, finding, and installing the Crash Bandicoot 1 PSP EBOOT on your handheld console. What is a Crash Bandicoot 1 PSP EBOOT?
If you want to play the original Crash Bandicoot on your Sony PSP, using a PSP EBOOT is the easiest method.
Sony originally created these files to sell classic PS1 games on the PlayStation Store for the PSP and PS Vita.