Place the .iso file into the ISO folder at the root of your memory stick.
The term "Club" in your search query likely refers to several things. Most commonly, it harkens back to the era of online forums and communities dedicated to PSP modding and game sharing. For example, the Chinese PSP forum (f.ppxclub.com) was once a significant hub for sharing PSP ISOs, with members posting extensive collections and links. However, many of the direct download links (like those hosted on Yunpan) have since expired. The phrase may also be a generic part of a website's name, such as "PSP ISO Club," which was used by various download sites over the years. psp iso club gta 4 link