i have a psp with a 2.82 firmware. i've got an auto upgrader/downgrader piece of software to downgrade to 1.5. i have 2 questions. 1. what is the "serial number" or version of GTA : LCS do i need (unpatched version)? 2. will i be able to run films,games iso etc with version 1.5 from a memory stick,or will i need to reupgrade to a new firmware afterwards. i'm new to all this stuff about psp hacking.