After the first batch of PSP’s that could be easliy modded, sony brought out a new batch on single and giga pack, that could be identified by the leter H of G on the start of the serial code on the box.
These ones cant run on anything lower than 2.0 (ive been led to beleive).
But its also worth noting, that any1 who kept their PSP at version 1.5 to enable the ability to emulate, cant play any PSP game that was released since 1.6 release, as the games demand the new version installed before they will run.
Of course u also miss out on the ultra neato and user friendly web browser….lol :P
— There might be a way around it, but its dodgey stuff, and the yokes are so expensive, is it really worth the risk.