PSP GAMES!!!!!!!!!!!!!!!!!!!!!!!!!…

so there are these cool games coming for the psp. ins creed bloodlines and Metal Gear Solid peace walker. I'm using a fat psp so will there be a UMD version of them??? oh and i have custom firmware 3.80 m335 can it run any UMD without me having to install official firmware? if not is it possible to upgrade my firmware without a pandora battery???? plz help thx!!!