i have a 3.11 psp, and i want to get it to 1.50 so i can put some firmware on it. i didn't find anything on mentioning how to do this with 3.11 do i need to upgrade or downgrade?
It should be downgradeable. You need the game Lumines to pull this off though. What you'll need to do is upgrade your PSP to version 3.50. You can find step by step instructions in this tutorial. It will take you through upgrading to 3.50 then downgrading to 1.50. After that I recommend installing a custom firmware, 3.03 OE-C or 3.40 OE-A.
okay. i figured i needed to upgrade to 3.50 then back down. its not even my psp, so im not going to bother buying lumines. thanks for the info anyways.