Leave USB mode, hit the select button on your PSP and choose Reset VSH option.
Open POPS.TXT with notepad and change ms0:sepluginspopsloaderpopsloader.prx 1 to: ef0:sepluginspopsloaderpopsloader.prx 1 Close and save changes on POPS.TXT. Overwrite all ) Inside the seplugins folder you will see a popsloader folder and a POPS text file: 4. Plug in your PSP to the PC via USB cable and copy that seplugins folder on the root of the PSP Memory Card. Right click the zip file and do Extract here, you will see a folder named seplugins. If you are having problems with some PS1 game this might be the solution: POPSLoader Installation: 1. POPSLoader let you change the version of the POPS as if you were running an older firmware. Sometimes the newest firmware doesnt work well with some PS1 games.
