PSP custom firmware confusion?

Question

Well I have a PSP slim running 4.01 OFW, and I'm so confused. There is no way to downgrade 4.01 OFW without a pandora's battery and a magic memory stick, and I don't think the official pandora's battery works with a psp slim, so the only way is to make one (which I tried and failed) or to use hellcat's pandora installer, which people say only works with CFW, and I would just go straight from 4.01 ofw - to - 4.05 m33

Answer 1

You can buy a Pandora's battery with a magic memory stick with custom firmware 3.01 m33 and it will come with the update 4.01 m33-1.. This one works on slim or fat PSPs. I own both PSPs and used this kit to set them both up with CFW.

http://www.pandorasales.com/psp-pandora-...