Time For A Game!:
You need some way of launching the application for it to work and flash the psp.
On 2.50/6 there was an exploit made by Edison Cater that allowed you to load files threw GTA, Fanjita made an Eloader to load more files etc...
Thats how the downgrader file works on 2.5/6..
You cannot just load a file, Unless you have a Sony encryption key.
With 2.7+ they patched up GTA.
So any files that can flash you psp to 1.50 wont load and therefore wont flash.
Hope this helps...


joshrulez2:
This is the process I have done, And I believe 2.60 firmware to be more stable.
You can if you want skip that bit and it still proboly work completly fine, But as I upgraded to 2.60 for it to work I thought i'ld tell others the way I have done it as It worked for me.

Thanks
PSPv1.00