I got tired of searching for custom backgrounds for PSX2PSP eboots. I thought I'd share the solution I came up with. : r/PSP
Explained: PSP ISO Vs Eboot Files & How To Install/Play Them - YouTube
Metal Gear Solid (USA-PSN) PSP Eboot - CDRomance
PSN style PSX eboot art - wololo.net/talk
Tutorial: How to convert PS1 games into eboots for the PSVita PS1 Loader - Hackinformer
Gex (USA-PSN) PSP Eboot - CDRomance
PSX2PSP - Convert Playstation (PSX) games to play on the PSP | Digiex
For the ps1 to pass eBoots process is there any way to get the eboots to look like the ones on psn (with the black boarder), instead of the grey borders they