If you have a slim you need to run despertar cementario v3 or v4 and you will also need a battery converted to service mode, and most of all a psp with custom firmware to make the memstick as you could always buy a datel tool battery.
If you live in the uk i can provide a loan service for the memstick and battery already made to upgrade a slim, you will however have to pay for postage both ways and make sure you return them when finished.
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