How to play games via the PSP memory stick

(my 1.5 psp with devhook 0.52)READ THE WHOLE POST:You can play psp games off your memory stick pro duo .All you need to do is download an iso or make a back up of your UMD in the form of an iso.You then have to put the iso on your memory stick and play it of on your psp with a UMD emulator i recommend devhook download it from here. But here's the catch you need 1.5 firmware PSP to play games .To