Can I downgrading a psp slim and lite without a Pandora/TOOL battery?

Downgrading PSP Slim with Pandora battery. Files?

• I have a pandora battery, which I want to use to downgrade my PSP Slim. I read in psp-hacks.com that you still need the 3.60 m33 files to install in the PSP Slim. Where could I find those files/ guide to install custom firmware on the PSP Slim?

• Answer:

  # Use this guide to create a Pandora's Battery and Magic Memory stick: Tutorial: How to unbrick your PSP via Pandora Battery - PlayStation Portable News - PSP Updates # Once you have a funcional Pandora's Battery and Magic Memory stick ( the FAT psp boots into service mode when you insert the battery with the memory stick already inserted.) # Extract the 3.60M33 Custom firmware archive. # Run the fat psp with the Magic MS inserted but WITH A NORMAL BATTERY. # Select USB mode on the fat psp and from inside the archive you just extracted copy pandora_slim and pandora_slim% to PSP/GAME, or if your 1.5kernel is set to game150, PSP/GAME150 (by default it is set to PSP/GAME, but you can check in Recoverymode->Configuration->1.5kernel folder) # Extract "EBOOT.PBP" from the 3.40 and 3.50 update packages you downloaded and rename them "340.PBP" and "350.PBP", then copy them to the "pandora_slim" folder you just copied to the PSP. # Run the program you just copied on the fat PSP (pandora-slim creater). # Insert the Magic Memory stick and then the pandora battery into the slim. The green light will turn on, but the screen will not, THIS IS NORMAL: DO NOT PRESS ANY BUTTONS # To install press X, ONCE. Wait until the green battery light turns off. this should only take a few seconds, as you are only copying a few custom prxes and team m33's custom ipl. http://dl.qj.net/M33-PSP-Slim-Custom-Firmware-3.60-PSP/pg/12/fid/14521/catid/114 3.60m33 ^^^^ http://www.psp-hacks.com/file/1130 3.40 official firmware ^^^^ http://www.psp-hacks.com/file/1164 3.50 official firmware^^^^ i didnt write any part of this, i simply copied it from http://www.pspmod.com