Look at the back of the box, it says 200 not 2000. Dunno why Sony decided to add a zero later but whatever.
And I found a way to update to 6.20 and then to 6.20 custom firmware, yay!
Basically it needs Windows, a PC, the USB cable and a text editor like metapad. And access to the flash0 of the PSP.
Edit:
Steps
- Power on your PSP.
- Click the 'SELECT' button.
- Go to the USB Device. Change the Memory Stick to flash 0.
- Connect your PSP to your computer (On windows). Click VSH and click the version which is a text file. The version in the text will be 9.90. Change it to 5.50 and save it.
- Enjoy updating your PSP and add awesome games.