Help with Grand theft auto on PSP

I have just downloaded GTA liberty city stories on psp. I put it in the .ISO folder then i go to click onthe game, it does the PSP thing then jsut goes black. my firmware is 3.51 m33
Answer #1
Click on Home button and select UMD ISO mode as M33 driver
Also goto recovery menu >> advanced and disable
Plain module….
and exexute boot.bin..
Answer #2
Umm, I just updated to 3.52 and could you give me step by step im kind of confused, thanks
Answer #3
/\ did u converted to the official 3.52 firmware?
Answer #4
yeah
Answer #5
Umm, I just updated to 3.52 and could you give me step by step im kind of confused, thanks
Click on the Home button on your PSP
Its on the front panel and select UMD ISO mode as M33 driver
Answer #6
yeah, i click on it and nothing happens, do i click on it on the main screen or where?