Nope, the image isn't fake. And yes, it is a screenshot of a hacked XMB. Are you interested yet?
We know our handheld's XMB looks fine and well already but changes are sometimes good. As much as you don't want to be wearing the same clothes every day and eating the same food every meal, we are pretty sure you don't want that for your PSP either. XMB Icon Hacking is a Lua application created by homebrew coder kgsws.
As the name implies, the application allows for changing icons on our XMB. It was originally made for 1.5 FWs. Although kgsws isn't sure if there will be complications with other firmwares, he suggested just the same to use custom ones so as to avoid problems.