M33 is custom firmware which will allow you to play illegal iso files, allow you to run homebrew, and has a lot more functions that don't come with OFW. To install it on a psp, follow the pandora tut in this section of the forum, find a tut for DCv5 at psp-hacks or something. If you don't have a phat, find a tut to hardmod a pandora battery. To pinoyboi, a pandora battery and mms will work on any psp, currently. To Zarin, a poll is optional... You hit the wrong button. Click start a new post, not start a new poll.