Tutorial: How to convert PS1 games into eboots for the PSVita PS1 Loader - Hackinformer
PS Plus PS1, PS2, and PSP games: existing owners, trophy support, and upgrades
How To Convert PS1 ISOs To Play On PSP - YouTube
Koudelka (USA) PSP Eboot - CDRomance
PSP Hacks: How To Install PS1 Games on PSP | Save Space and Customize - 2020 Edition - YouTube
Transfer Saves from PSP to PS1 | GBAtemp.net - The Independent Video Game Community
Are the PS1 games on PSP emulation or is there some sort of hardware backwards compatibility ? I wanted to put all my PS1 games on it but idk if there can