Well John, if it is an offical 3.01 FW which means it is form $ony, then u have to upgrade to 3.03 to downgrade it back to 1.5 FW and then upgrade to a custom FW... Like, 3.71 M33 Custom FW for example which is the latest FW right now.... Here is a link that can help you out: File Details-Downgrader-for-v3.03-PSP-PSP -. But be4 upgrading to 3.03 from 3.01 read the article first to make sure you can get a copy of Grand Theft Auto : Liberty City Stories or have one (the original one with the 2.00 update on the UMD). In order for this expliot to work.

__________________