This website provides you with PSP game installation tutorials:
http://www.pc6.com/infoview/Article_70675.html
First of all, it depends on the format of your game, which is generally the IS0 format.
We need to decompress the file name with the suffix "iso", and then put the ISO file into the ISO folder
Make sure it is in iso format and put it in the ISO folder
If it is a folder, put it in PSP/GAME/
When you open a file in ISO format, you will generally see two files in it
So first confirm the format of your file
There are also some compressed CSO games, which are also directly placed in the ISO folder
Note: When playing games for free on the PSP, you must first crack the PSP host system, that is, the commonly said machine brushing. You can complete the crack of the PSP system by brushing in the self-made program