[zdargh]

I'll try to answer some of the questions as I saw them in these few pages:

I use a psp slim, used a slim pandorized battery, a regular fat battery, and was running CFW 3.90m33-2 to do this.

I followed every single direction and you have to hold "o" before and during the time you put the battery back into your psp. I think your pandora battery can still be used as a pandora battery after this... if not you can still softmod it back to be a pandora battery, pretty simple.

Also, I went ahead and installed the 6th option that is just for slim, it says it installs 3.60m33 or something... anyway after I installed it, I could hold "o" and boot into 1.50 with my pandora battery.

after you finish all this whole proccess as the guide says, your CFW will not downgrade or get formatted, I can hold "o" and boot into 1.50, then reboot without holding O and my cfw goes back to 3.90m33-2.

The past two days I been working on my psp with various mod and programs, I'm new to this, but I can answer some questions online, just message me and say you have psp question. AIM is zdargh