I just followed this guide
http://psp3d.com/getting-started-hel...ncluded-d.html
I found the iso in devhook and pressed start. The psp restarts and I had v 2.5.
I put in a disk with gta and started devhook again and choosed again the iso of the game I had in my iso folder at the root of my memory stick. Pressed start again and got a reboot, but the game won't start..
I have also tryed umd emulator v 0.8 and found the iso there. It just wouldn't load. Just goes blackscreen and jumps back to the psp "desktop".
Only thing that work is my emulators for nintendo, pc etc.
I can allso get the psp into 2.5 with devhook and run gta original gamedisc..
Please help me!

Doubleposted Message Below:
I made it! I can run loco roco. Gues it wouldnt run on 1.5?
Is it only old games that runs with emdemulator? Do I need to use devhook for ALL games or what?