It's finally done! MPH did it again! After his downgrader he now released Game Launcher, a way to run GTA on your PSP 1.50. This method is confirmed working and you can download the launcher on his website. MPH clearly states that this the GTA version, and will release the full version next week.
Here's MPH's comment on his application:
Here the 2.00 game loader for 1.50, see the readme.txt for informations.
This is a demonstration version, the play will stop after 10 minutes, if I did it, it's to do a little pub for my site, for boost adsense and the donations ;-)
I don't like to do that but it's the only means which I found to allow i hope to buy a psp 2.50 to be able to try other programs ;-)
The full version of the loader will be available within one week, it does not matter the results obtained but i hope to be able when same to count on your generosity.
Here's a quote from the nfo
MPH 2.00 Game Loader for 1.50 (gta version)
Before using this program, please read what follows :
- The loader requires iso of the game to run, that doesn't want to say that you can use the iso if you don't have the original umd.
- You will need umd emulator, umdgen and a tool called DecryptPRX which is not other than a modification of the psardump tool of psppet.
Iso modifying :
You will need the iso of GTA to be able to continue, I will not give the means of obtaining it, therefore don't ask me on this subject.
Once the iso obtained, it will be necessary for you to extract all the files from the iso (use umdgen).
Then, place PRX2_0_0 folder (in PSP_GAME\USRDIR folder) has the root of your memory stick.
Execute then DecryptPRX, it will create in PRX2_0_0 folder somes files with dcr extensions, remove all the prx files and replace with the dcr files created (remove the .dcr extension) (to replace the crypted prx by the deciphered prx).
Then, recreate the iso with all the files which you had extracted AND PRX2_0_0 folder containing the deciphered prx.
Now you have iso on the good format
Firmware 2.00 installation :
You will need firmware 2.00 in files format, use psardump to obtain it or my firmware launcher and use the function to install a firmware.
Once that you have the files, create the mphgameloader folder has the root of your Memory Stick and copy flash0 (kd, vsh...) and flash1 folders inside.
Currently the original version works for only ten minutes, but iND already released a patch to fix this.