halp
You must first hack your psp and then import the mua iso or cso to your psp using usb connector.
It's easy. Go out and buy the game, pop the UMD drive open, insert game.
Take your piracy somewhere else.
:'( i wasn't suggesting piracy or torrents and i already have the disc i just wanted to know how to burn the disc to my memory stick
Why? That would take up too much space. Just play the game off the disk. Its not worth taking up the space.
You must first hack your PSP, then use the XMB switcher to switch USB mode to UMD, then connect the PSP to the PC. Poof, you get access to UMD contents. Make ISO from that (note that for MUA2, due to it having anti-piracy protection, you will have to resort to more complicated hackery programs), put it into ISO folder on the PSP (the "hack" part covers getting that). Apply mods as necessary.