I just used this tutorial and file: http://tricebit.com/blog/download-and-inst...irmware-by-m33/ to upgrade my 2.71 SE-B PSP to 3.52 M33 but now when I go to the system info it still says i have 2.71 SE-B. I did everything the tutorial says. Am I supposed to have a newer firmware before doing this update or something? I know 2.71 is really old, I've been away from the PSP scene for a while and don't really know whats going on anymore.

You could try downgrading to 1.50 via Recovery Mode, then installing 3.52 M33.

or try upgrading from there to something else like 3.40 oe-a and if you want... to m33 afterwards

i suggest going back to 1.5 first...and then upgrade it to 3.10 oe-c..then to 3.52 m33 thats what i did lol...i tried upgrading to 3.40 from 3.10 that didn't work my psp couldnt locate the dak file for w/e its calledl =\

Wat difference would that make...either way it formats the flash0

Past experience tells me that that is more reliable than upgrading custom firmware directly.