Hello all,
Currently the only way to downgrade any PSP model except the PSP 3000 model from 5.50 to 1.50 , is to use a Pandora Battery along side with a Magicistick which will have the files needed to downgrade your PSP .
Here are some important files you will need in order to downgrade your PSP 5.50 to 1.50
Despertar del Cementerio v8
You could Download From Here
Official PSP Firmware 1.5
Download From Here http://pspcustomfirmware.com/psp-custom-firmware/cfw-150/official-psp-firmware-150.htm
And latest PSP Custom Firmware 5.02 by PSP Gen if you like to have the latest Custom Firmware for your PSP . Download CFW 5.02 Here http://pspcustomfirmware.com/psp-custom-firmware/502/psp-custom-firmware-502-gen-a.htm
Here some Video Tutorials on how to downgrade PSP Firmware 5.50 if you are having a hard time . Watch Video Here http://pspcustomfirmware.com/videos/tag/downgrade+PSP+Firmware+5.50
Recent Posts:

where can i get PSP custom firmware 5.50. Because i use version 5.50 on my psp now. i can’t play any ISO game anymore. before this i’ve version 3.40 m33. i accidentally upgraded to 5.50.
please help me how to downgrade my psp.
[...] Downgrade psp 5.50 to 1.50 pspcustomfirmware.com – by Pspcustomfirmware.Com – May. 1, 2009 (News Report) Currently the only way to downgrade any PSP model except the PSP 3000 model from 5.50 to 1.50 , is to use a Pandora Battery along side with a Magicistick which will have the files needed to downgrade your PSP . More » Review | Like | Submitted by pspcustomfirmware.com | Story info | 2 reviews [...]
[...] Downgrade psp 5.50 to 1.50 – PSP Firmware Downgrader [...]
[...] Downgrade PSP version 5.5 Click this This explains how to do it with a 5.5 and has a video to show it. It doesn’t have the files [...]
[...] to downgrade to of… http://www.psp-hacks.com/2009/04/21/psp-firmware-550-rele... • Downgrade psp 5.50 to 1.50 | PSP Custom Firmware Here some Video Tutorials on how to downgrade PSP Firmware 5.50 if you are having a hard … [...]