Once the installation process is complete, safely disconnect your PSP from your computer. Navigate to the Game menu on your PSP and select the GTA 5 icon to launch the game.

Using the TP Install tool, create an ISO file from the GTA 5 PSP data. You may need to specify the game data location, the output ISO file location, and other settings.

You can try searching for "GTA 5 PSP ISO file" or "GTA 5 PSP download" on popular file-sharing websites or gaming forums. Some websites may offer the file directly, while others may require you to create an account or complete a survey to access the download link.

Download the TP (PSP) Install tool from a reliable source. This tool will help you create the ISO file and install it on your PSP.

Ensure your PSP device has a custom firmware or homebrew support. This will allow you to run the TP Install tool and install the GTA 5 PSP ISO file. If you haven't already, install a custom firmware like Henkaku or Ensō.

Connect your PSP device to your computer using a USB cable. Make sure your PSP is in USB mode.

Before we dive into the process, it's essential to understand that GTA 5 was never officially released for the PSP. The PSP's hardware limitations and lack of official support from Rockstar Games make it challenging to run the game smoothly. However, some talented developers and modders have managed to create unofficial ports and adaptations of GTA 5 for the PSP.

This article is for educational purposes only. We do not condone or promote piracy or unauthorized game distribution. If you choose to download and install GTA 5 PSP ISO file, ensure you have a legitimate copy of the game data.