Hello how can i upgrade my psp????

Hello. It is very simple do to this. You should only follow my steps:

First of all, you have to download a file name called EBOOT.PBP (psp upgrade) which is located HERE
Save it on your desktop and do not rename the file.
Plug in your USB cable and go to your PSP's System Settings and on the second from the top press X on USB CONNECT. Go to "My Computer" and click on Removable disk. Here it should be a folder named PSP followed by a subfolder called GAME. Enter this folder, create a new folder and name it UPDATE (in caps without spaces). In the folder you have just created, move (copy - paste) EBOOT.PBP here from your desktop. Also, if there is no GAME folder, you have to create it in the folder "PSP". Be carefully! Remove your hardware and fully charge your PSP and plug it on the wall. Go to Games Area and choose Memory Stick by pressing X. You will see now PSP Update version
*. **. Press PSP Update version *. ** (it will only clear your screen for a couple seconds). Press Start if you want to upgrade. Go to User Agreement and start the upgrade process. While it's started, do not touch your PSP. Leave it somewhere until the upgrade is done.

I hope I helped you!

Hello,

visit the below link and follow the instructions there. Its really going to be of great help.

http://www.wikihow.com/Upgrade-Your-PSP-Firmware

Take care.

ask your parents bub!

wait man why upgrade! maybe its ur mount

hit select and go to iso mount and make sure its set to sony np30903

plz check that first

Hello, you can connect the PSP to the internet, you will get an automatic prompt to update... if you dont get that, go to "Settings and scroll up to updates..

regards

HELLO! There's no need to downgrade ur PSP. If u have upgraded ur PSP from the official site and a official firmware has been installed on to ur PSP, it won't execute games(ISO,CSO) from ur memory stick. It will only run games from the UMD. If u want to run ur games from a memory stick u have to install a CUSTOM FIRMWARE. Try www.psp-hacks.com these guys have many softwares on their site. Dont worry its not that hard to put a Custom firmware onto ur PSP. 

I don,t know who this ziraffa is but I know the answer to your question.This is because the higher upgrade the higher the security,parentalcontrol,blah blah blah.But your not out of luck you can still upgrade to custom firmware.With this you can play homebrew games,isogames,csogames,etc.

http://www.pspmod.com/forums/downloads.php?do=cat&id=4

UMMM you don't need to upgrade you need to downgrade. Once you downgrade you can actually go ahead and upgrade to a custom firmware wich are the ones that allow you to do that and much more. If you really want to know how to do this and are still interested please send me an email at angelitoseriv@gmail.com. I say email because its a long process and i would need to ask you some questions about your psp and other stuff to so if you want more help send me a message with psp info as the tittle.

if you downloaded the new version, you should just run the update under the the memory stick in the games section. there is no need to downgrade ever.