Help with ISO

[Qelwa]

When it comes to computers, I'm relatively bad at doing things. I tend to read the instructions, which typically works. However, in the case of the game Fate/Extra, I can't seem to find the ISO which I can use to play the game through PPSSPP. Could someone help me? Or at least tell me if I'm completely off with what I'm doing?

Here's the link, if anyone needs it to help me out:

[LINK DELETED]

Also, I'm sort of new here, so I don't really know where this should go, my apologies for lack of knowledge.