Instructions
Turn off the Sony PSP. Hold the "Right" trigger on the device as you power it up again. The recovery menu will appear.
Select "Registry Hacks" from the list that appears. Select "Activate WMA" to activate the WMA player.
Select "Activate Flash Player" to activate the PSP's Flash capabilities. Select "Back" and "Exit" to reboot the PSP. When the PSP powers on again, it is WMA and Flash enabled.