Ancora una volta il team Noobz (di cui fa parte anche Fanjita) si fa sentire, rilasciando un nuovo downgrade per le psp che montano il firmware 2.01.
Questo downgrade si basa sullo stesso medoto usato dal downgrade di mph: il firmware, attraverso un version changer, viene portata ad un "falso" 1.00 e, fatto questo, si avvia l'aggiornamento ad 1.50.
Ricordo che per effettuare questo downgrade, dobbiamo utilizzare l'eLoader, più precisamente l'ultima versione, la 0.9.8 (che potete trovare qui) la quale sfrutta il baco recentemente scoperto dei file tiff.
Di seguito le istruzioni e a fondo news il link per il download:

[quote=Noobz Team]
1 First you need eLoader 0.98 or later (get it from www.noobz.eu).
2 Install eLoader, and make sure that it is working for you by loading some nice safe homebrew

3 Next unzip this downgrader package onto your memory stick. You should end up with the EBOOT.PBP file copied to /psp/game/201downgrader/EBOOT.PBP.
4 Also copy the v1.5 Update EBOOT to /psp/game/update/EBOOT.PBP.
5 Now run the downgrader via eLoader. Assuming that your PSP passes the safety checks, you should be given a menu of options.
6 To downgrade, you need to select the 'set to v1.00' option (the Circle button).
7 This will fake your PSP to version 1.00. Once you've completed the process, you can run the v1.5 Update EBOOT, directly from your PSP's Game menu.
8 Note that when the v1.5 Update is 99% complete, it will display an error message that it has 'failed - contact Sony customer support, error code FFFFFFFFF'.
9 This is OK! Just power off your PSP, and reboot it. You then get a blue screen, saying "Press O to reset your settings" in several languages. Press O, and your PSP reboots again - voila! You now have a v1.5 PSP.
10 Note that, before you install the 1.5 Update, your PSP is still really a v2.0 or v2.01 PSP, but it will claim to be v1.0. If you've changed your mind about downgrading, you can choose to rerun the downgrader, and restore your old version number, with either the Cross or Square button, as appropriate.
11 Alternatively, if you changed your mind about running the downgrader, you can just press Triangle to exit without changing anything.

DOWNLOAD: Downgrade 2.01 To 1.50