Can Some Kind Knowledgeable person write a guide and post it here on how to downgrade ur firmware, install a custom firmware, and play downloaded PSP games off ur psp memory stick?

Google is ur friend!!!! But let me point you into the right direction... What you need to do is downgrade you psp to 1.50 then upgrade it to 3.71 m33-2 (thats the newest custom firmware right now)

Here is a guide to downgrade from 3.50 firmware and below.. You need Lumines UMD game (this is the one i did):
http://forums.exophase.com/showthread.php?t=2470

Here is a guide to install 3.52 m33-4 custom firmware... You need 1.50 firmware to install this (this is the same guide and files i used):
http://www.stylemo.com/2007/09/14/how-to-install-352-m33-4-on-your-psp/

Here is a guide to install 3.71 m33 update... You need 3.52 m33-3/m33-4 or 3.60 m33 already installed to intall this:
http://forums.exophase.com/showthread.php?t=3662

Edit: After checking that link its missing the 3.71 m33-2 + 1.50 Kernel patch (Kernel patch is for fat psp only)... So you need 3.71 m33 to install these patches here is the guide:
http://exophase.com/psp/dark_alex-releases-371-m33-2-150-kernel-add-on-v2-2133.htm


If your so unlucky to have a psp passed 3.50 your going to need a pandoras battery... You need a extra battery to make this because after you have hacked you battery it can only be used to downgrade/unbrick psp, therefore you CAN NOT use it to play games with after.... Also You cannot make it without a already hacked psp which sucks... Here is the guide:
http://www.pspmod.com/forums/psp-hardware-guides/20964-pandora-battery-guide-noobs.html


Here is a guide if you have a psp slim... You need a pandoras battery and a fat hacked psp:
http://forum.mininova.org/index.php?showtopic=234996505


After finding that last one i realized it has guides for just about everything in that post... oh well extra guides is always a good thing :D

Well i hope this i a good enough point in the right direction... Good Luck & Happy Moddin... oh and just so you know, if you somehow **** up and briick your psp... The pandoras battery can unbrick it for you so you wont be completely screwed... i have haved hacked so far 4 psp all successful... Just make sure ur battery is full, the psp is plugged in and you dont turn the the ****in psp off when its installing!!! Good Luck Again :D

good yute, well done :clap2 upgrading ma system 2night 2 3.7

Its funny i was just about to PM you back to say i posted this... Im about a month late but... better late than never :D

many thanks i will be using this sumtime in the near future and hoepfully ill have a modded PSP.
*** dear lord pls dnt let ma PSP die.....***

Has anyone gone through with it yet?

nope...plans fell through so no modded psp for me. oh well just gotta keep on buying those umd's.