Back up the iso or cso game first, then unzip and open the game, put the patch in the game folder according to the prompts, and then compress it back to the original iso or cso format with special software. Please refer to the description of the specific folder. In addition, the img you mentioned must be in the game file, which should be found after decompression. This may be in iso/game/img. Look for it.

You can continue to ask me for help about PSP and PSV, because you can't see the problem on your mobile phone, please ask me for help. Satisfied, please adopt!