Upgrade from 3.80 to 3.80 M33

[Sano17]

I have been trying to upgrade from 3.80 to 3.80 M33 all day long on my fat PSP. I was an idiot and let one of my friends borrow my PSP and they did an upgrade

Does anyone have a simple guide or video to follow for this?

PLEASE HELP!

I have all:

3.80 Update (original file)
3.80 M33
3.80 M33.2
1.50 EBOOT
1.50 Kernel Add On for 3.80 M33

Thank You!

[VeryThinPSP]

Do you have a Pandoras Battery and MMS? If you do just follow this guide: Click Me!

[zII Snowman IIz]

Mate you need to create a magic ms and a pandora battery

[plasticslug]

you need to punch your friend in the flocken face! then break his fingers while hes passed out....

if i understand right you would have to pandora to 3.71 m33, then do the following updates 1,2,3,4 to get to version 3.71 m33-4 then...... install 3.80 m33