Before Gran Turismo Portable (GTP) release,  I am very interested in it! It was one of the awesome racing game I had  play before when it was on Playstation and Playstation 2 (PS2).

And now the PSP Gran Turismo is out! However there are some issues if you want to play the downloaded ISO from your mod-ed PSP.

Problem:

After PSP’s Gran Turismo Portable image (*.iso) available for download from Internet. There are many who failed to play the downloaded GTP because it required firmware version 6.0/5.50 .

It is not playable in Custom Firmware 3.70, 3.90 M33 o. …or even 5.00 M33-6!! Yeah, I agree that CFW 5.00 M33 is an outstanding CFW that have we play quite number of games. Until this new Original Firmware 6.00 are release, it seems minimum requirement from most of the new games required firmware version 6.0/5.50. Or even can’t play if we have not patched the game! In other word, we are suck now! Yeah, “we”! Mine is PSP-1000 series with CFW 5.00 M33-<unknown> who failed to played Patched GTP! (describe patched GTP later)

Here are some common question posted by some gamer who failed to make it work:

I downloaded PATCHED GTP but how come it still doesn’t work. Is this a prank, fake or what?

Hey I GOT CFW 5.00 M33-6! Why it still can’t work!?

Not working with CFW 5.00 M33-6, frezzes pas psp logo!!

Tried Game Decrypter with GT on my PSP-3001 using GEN 5.03A and still getting black screen.

Solution:

Don’t worry, you just need to sweat for few seconds because there are some great man who made 6.0/5.50 firmware required games work!

From what I have tried, your PSP

1. need at least Custom Firmware 5.50 GEN-B, and
2. Your game must be patched by using Game Decrypter (Thanks to Yoshihiro )

First Step: Make sure you have upgrade your PSP CFW to 5.50 GEN-B
In order to upgarde to 5.50 GEN-B, you required to upgrade your current CFW to 5.50 GEN-A. Then only upgrade to 5.50 GEN-B from 5.50 GEN-A. This is the compulsory steps. Don’t worry, it’s as simple as learning 1-2-3.

CFW X.XX –> CFW 5.50 GEN-A –>CFW 5.50 GEN-B

1. First, download Custom Firmware 5.50 GEN-A, it is easily found from Internet  (e.g. you may get it from here)
2. Extract the 5.50 GEN-A downloaded zip file, copy it to your PSP memory stick.
3. And run the 5.50 GEN-A PSP Update from your PSP.
4. It will ask you to press “X” to continue and you can just do so.
5. After it is done, you will be getting PSP 5.50 GEN-A from your PSP’s System Information.
6. So now you have 5.50 GEN-A, next we need to upgrade it to 5.50 GEN-B. Same thing, just download the Custom firmware 5.50 GEN-B (e.g. you may get it from here)
7. Extract the downloaded 5.50 GEN-B zip file, and copy to your PSP memory stick.
8. And run the 5.50 GEN-B UPDATER from your PSP.
9. After it is done, your PSP should be CFW 5.50 GEN-B! Congrats!

Second Step: Prepare a patched GTP
While I’m writing this, patched GTP are available for download now. (A) For the easier & lazy way, you can download the Patched GTP and it should works like magic in your upgraded PSP.

(B) The other alternatives is assume that you had downloaded the Original GTP and don’t bother to download the almost 1 GB big file again due to your poor broadband speed. You can use Yoshihida Game Decrypter and UMDGEN to patch your game by yourself.  This will allow you to run your backup games that requires the OFW 5.55 to work properly on custom firmwares 5.50GEN.  The following are the guides I got it from developer’s note and some extra steps that I add in

1. first you need to download Yoshihida Game Decrypter (e.g. you may download from here), extract and install the GameZDecryptZ folder in your X:PSP/GAME  folder
2. *Before you made any changes to the original ISO, it is advised to “Menu > File> File List > Export…” export the file list. (this file is needed later)
3. Okay, now use UMDGEN (e.g. you may download from here) to extract PSP_GAME/SYSDIR/EBOOT.BIN and put that EBOOT.BIN on root of your PSP memory stick.
   • in UMDGEN, open GTP iso file. Browse to PSP_GAME/SYSDIR/EBOOT.BIN, right click on that EBOOT.BIN and choose “Extract Selected..”, extract it to your root of memory stick.
4. Then you can boot game decrypter now you can press X to continue. You will noticed a new folder named “DECRYPTOR” is created on root of your memory stick.
5. connect your usb cable check on root of your memory stick and copy the EBOOT.BIN from the DECRYPTOR folder to UMDGEN and replace that  PSP_GAME/SYSDIR/EBOOT.BIN.
6. *Now import back the file list that you just exported earlier, “Menu > File> File List > Import..”. And select YES to forcing LBAs, then Save.
7. Now rebuild the ISO file. Just save your the modified ISO from UMDGEN to a new ISO file.
8. Finally…. yup! your game is patched! Just copied that new ISO to your memory stick and RACE!!

!!!Important Note: Custom Firmware 5.50 GEN-B. CFW 5.50 GEN-B is ONLY compatible with the PSP-1000 (Fat) & PSP-2000 (Slim) v1 or v2. DO NOT attempt to install this on a PSP-3000 or PSP-2000 with the TA-088v3 motherboard. And try this at your own risk.