downgrade possible?

[-zeus-]

I have a psp 1000
It had custom freeware 3.50 than i upgraded it to 6.20 unknowingly that my iso games wouldn't work now i won't to upgrade it to 5.50 cfw and i don't have a pandora battery how do i do it?

[skyend]

You'll need a pandora battery & make one MMS using Rains Ultralite MMS maker

[-zeus-]

ok tx.

[-zeus-]

ok can u give me procedure to do this plz

[skyend]

Procedure to make a MMS or put cfw ?

[-zeus-]

procedure to put back the 5.5 cfw
and can u also show me link for making mms tx

[skyend]

Quoted from this guide :-
[Guide] Using Despertar Cementerio v8

Create a magic memory stick (MMS) using the program of your choice. Links can be found in the "Links" section.
Turn off the PSP and remove the normal battery & memory stick.
Insert the MMS.
Hold down the "L" shoulder button.
Insert the Pandora battery.
Once the menu boots, you will be greeted with a number of options:
(Notice: these options may be different when using the XGEN Panora versions)
Install 5.00 M33 - Installs a fresh version of 5.00 M33-4
Install 5.00 OFW - Installs fresh version of 5.00 OFW
NAND operations - Dump/restore NANDS, IDStorage Options
Hardware Info - Hardware Info such as motherboard, tachyon, etc.
Test M33 - Boot into a "live" version of 5.00 M33-4 for testing purposes
Shutdown - Self-explanatory
Reboot Device - Self-explanatory

Select the first option -> install 5.00 m33

This will make a MMS for you Rains UltraLite MMS Maker for 5.00 M33-4, PSP Hacks - PSP Slim Hacks

[-zeus-]

ok i shall try it out thank you

[TheJag]

I just did it from 6.20 easy. So yes.