PSP games on RPCS3

I've converted the ISO of a PSP game to a PKG format using a PS3minis program. On a normal ps3 you can just install the firmware and play the game but on rpcs3 I'm getting this error.
E LDR: Invalid or unsupported file format: D:/PS3 EMULATOR/dev_hdd0/game/UCUS98711/USRDIR/ISO.BIN.EDAT
Is there a way to still play this game or is it completely unplayable? I know I could just use a program like ppsspp but I like to have everything in one place.

The firmware's pspemu is not supported yet, you need a PSP emulator to play your PSP games.