High possibility they do it by booting from the memstick. I can tell you ppl why if you're interested.

They just repaired the BIOS hardware of the PSP (by changing hwly it). So just get the SONY tools (I think around $15,000 for an micro-electronical commander) to 'micro-unlock' the fw hardware and change it by a new (that you'll have to steal it from a clean psp).

@NaYoN:
If it's bricked you have to do an hardware operation [like changing the EEPROM which contains the BIOS and original fw].

maybe this eboot is what we need

if we could get this up and running we could take a lot more risks and make a lot of progress without fear of bricking

It's not just an eboot Mc... it's a complete EEPROM which cost like 10c but we'll need to cfg and code it, and ship it like $10/p around the world... easy money, cheap business, yeah dude.

don't sony just reflash them using the rs-232 connector next to the headphones socket?

Is anyone making an unbricker for the psp cos that would more or less mean upgrading and downgrading on what ever verison youve got by reflashing your psp.

true its much easier to make a unbricker than a downgrader./ebootloader