This custom firmware improves the firmware of the Time Machine, it is very useful for owners of PSP SLIM. By adding vshmenu, the possibilities of launching a UMD higher than the 1.50 (a little Bug for the moment but will soon be corrected), a recovery, the possibilities of changing the name of the firmware, and many other things. It is also compatible PSP FAT. You must have the latest version of DDC ( Despertar del cementario) and the time machine. The installation should be done 150_340 SLIM.