Hacking that PSP
There is a book called PSP Hacks so I think Blogging something about PSP Hacking is fine. Anyaway, I just got my PSP upgrade from a 3.03 OE-C firmare to 3.40 OE-A firmware. Cool Eh? That should do more stuff to my PSP. Before you try to upgrade make sure you have your battery charged at 100%, updating should not take longer than 30 mins(depending on how fast you do things). I have pasted here the two sites from which I followed (alternately) as I upgrade my PSP. Before you start, try to read a lot about it first and try to read about PSP recovery mode.
http://youtube.com/watch?v=fP0n9ldYbnw
http://ubergaming.wordpress.com/2007/07/02/psp-firmware-340-oe-a-upgradeinstall-guide/
I got lost for a second what XMB means, be sure to educate yourself as well on technical jargons.
Good luck hacker!!!