psx4iphone v0.1.0 has been released publicly.
It is on Installer.app now or can be downloaded from the publishers site here.
Once downloaded you need to create a PSX folder here: var/root/media/ROMs/PSX and then add ROMs to: var/root/media/ROMs/PSX
Do not ask for ROMs here or ask for ROMs on this site
This is an unofficial Playstation 1 emulator for the iPhone and iPod Touch. It has a good compatibility rate and features save states and a dynarec for added performance.