There are two ways to update PSP firmware - through the network or with a PC.
In order to update PSP firmware with the network, a wireless internet connection is required.
Where these applications could initially be run on the 1.50 firmware PSPs, users who updated wouldn’t be so fortunate.
But the community (read: hackers) did not accept defeat.
If you want to use homebrew software on your PSP, you can install custom firmware.
There are several ways that you can update the firmware on your PSP.
If you have a network connection, you can update directly from the PSP itself.
Otherwise, you can use a computer or a game disc that comes with update software.
Fortunately, updating your PSP's firmware is not difficult, though it can be a little confusing at first.
Keep in mind, however, that if your want to run homebrew programming, updating your firmware might not be the best choice.