Want to use Dark_Alex's recently released Custom Firmware but unsure of the consequences? Here's an application by Slasher that should help you out. Slashers Custom Firmware Unflasher does exactly what it says on the tin: 'unflashes' any modifications that the Custom Firmware proof of concept makes to your PSP, leaving you with fresh PSP firmware 1.5 again whenever you want to. This bypasses the long-winded way which involves changing your PSPs version number and then re-updating to firmware 1.5 again using the 1.5 firmware update EBOOT. Here's how to use it:

1. Simply put the two folders in ms0:/PSP/GAME/(here)
2. Plug in your AC Charger
3. Run the program from the XMB
4. The program will proceed to undo any of the changes
5. If all goes well, your PSP will exit the program and go back to your original 1.5!

Use the Custom Firmware Proof Of Concept with peace of mind!