Says Sony as part of its release notes, users located in other regions will be seeing the new firmware version at some unspecified point in the future, and shouldn’t try downloading this version.
This is a relatively small update as far as new firmware versions go, with the “main features” being an improvement to the software’s stability.
Such is really the case, with the Play Station Portable being on the receiving end of a new firmware version that improves stability and not much else.
If no update is found everything is fine and you can stop now and play some games. The rest of you need to make sure your memory card has 21Mb or so free space (update sizes vary a little). Read what's in the update and press 'right' one more time. It is vital you don't unplug or turn off your PSP until the process is complete; you could cause a lot of trouble.
Using the PSPUsing Your Computer Using a UMDInstalling Custom Firmware Community Q&A Your PSP firmware controls your system settings, and new versions get released to add features and fix errors and security problems.
Installing a Custom Firmware on your PSP 1000 has never been so easy.
In this page I’m describing the easiest possible way for you to install the most reliable Custom Firmware on your PSP: Pro CFW.