if you've come from 1.5 to 3.02oe-a then you will need to add a folder called ISO in the root of the memory stick. also create a folder called SEPLUGINS in the root. in the PSP folder make a folder called GAME and another called GAME302 if you haven't already done so. power the psp all the way down by holding the power switch up for like 5 seconds or taking out the battery. then press and hold r trigger and power on the psp. in the recovery menu go into configuration and change "Game folder homebrew" to currently: 1.50 kernel. exit the menu and in usb mode move a homebrew/emulator/whatever to the game folder. try to load it up and see if things improve.