You have to download the official Sony Firmware 1.50 and 3.03 Updates. Do a quick search on Google or other websites (not sure where they are around this site - I'm new to this one myself).
Their original names each will be EBOOT.pbp (both will be the same). Be careful not to screw up which is which, and rename the EBOOT.pbp from the 1.50 updater to 150.pbp and the one from the 3.03 updater to 303.pbp.
--Databoy2k
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