changing firmwares

can someone with a strong patience help me step by step onto how to change from 3.02 OE-B to 3.71 m33-2?

Use this tutorial to go to 3.40 OE
Use this tutorial to go to 3.52 M33 then M33-4
Use this tutorial to get to 3.71 M33 with 1.50 kernel

Yea.. it takes some work, good luck. Just ask if you need nay help. Maybe their is a faster way (Pandora's Battery) but this is probably easier to do.

omg thanks so much one more question is 3.71 M33 with 1.50 kernel
firmware considered to be one of the best firmwares which can run a majority of psp iso's?

Yes.

okay so now i have 3.40 oe- a and now it says to obtain firmwere 3.52 M33 i need 3.52 m33 files with no 1.50 &3.52 Eboot

Firmware 1.5

Firmware 3.52

and i dont have any of that or do i?

Go to the next tutorial http://pspbrew.com/forum/viewtopic.php?t=9543

okay im having trouble with [Use this tutorial to get to 3.71 M33 with 1.50 kernel ] because
Step 3. Run installer witch installes 3.71 *note* when it installs it looks like the sony installer but its not it takes you out of the homebrew menu and installs it as if it were official so dont be scared. doenst make sense because i dont know where the untsaller in and when i put the updates in it says on my psp corrupted data

You can also get the direct M33 files and installs from the man himself that created these CFW: http://www.dark-alex.org/

And you can get mostly all the original Sonuy firmwares from the download section from www.psp-hacks.com