actually, customfirmare enabler only installs 5.03m33-6 and to install 5.03GEN-A ur going to need the installer(go 2 dl.qj.net or psp gen). The thing about customfirmware enabler is that after a hard reset its going to go back to official firmware, while 5.03GEN-A is forever as long as u dont upgrade 2 to a higher firmware. Hope this helps. ;)