As you can see by my postcount I'm kind of new to PSP homebrew's/hacks.
I recently got a PSP with firmware 1.5. Now I have a couple of question concerning playing homebrew's/backups

What do I need besides the Memorystick and the 1.5 firmware?
Is it just as easy as putting the ISO's/CSO's on the memorystick and boot them on the PSP or do I need extra software/firmware?
Does the 1.5 Firmware support all sizes of Memorystick and all games?

Thanks in advance. If I'm annoying with my noobquestions you could refer me to a wiki ;-)