If you’re not satisfied with your current firmware 6.31 or 6.35, then downgrade to 6.20 and run Total_Noob’s 6.20 HEN. It’s supports POPs, VHS, and other fixes.
How to Downgrade:
Copy the “PSP” folder to your PSP. The downgrader is “signed” and can be launched from OFW XMB. You need to copy the 6.20 update to PSP/GAME/UPDATE/EBOOT.PBP and for PSPgo it must be the eflash it is placed on. After setup run the downgrader and follow the onscreen instructions.DOWNLOADS