Ive got a god of war slim psp. it came with a 3.95 firmware but my buddy used a magic memory stick with padora battery to get it to 3.8 m33. i now have 4.01 m33 with the 1.50 kernel addon. i tried a couple emulators a n64 and SNES one. but both have the same problem. the game would run past the sony psp screen and then there would be the "game cannot be run error 80020148". problem. i formatted my mem stick after updating to 4.01. and changed the option to run 1.50 kernel from the recovery menu. this psp is several months old too so its not the new unhackable motherboard.