You have to download zarchever then go to the game you downloaded and then hold on it then then press extract here

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You just have to download a zip file of lap software, then you select "load" and then select the file and download it to the emulator. After that is done you can delete the zip file but don't delete the ISO file.

And if you have a PSP get a umd dumper and dump it to the save card and transfer it to your device 

Go to coolrom.com and choose PlayStation and choose your game then download Zarchiver and extract it or fo go to Youtube and search up how to put games on PPSSPP okay this is your answer.