firstly there are NO new ibooks
its MACBOOK now
the way to transfer files to the psp through usb is easy simply plug it in and use it.
of course apps made for windows will not work(i hate executables!!) but if you get a mac book, you partition your hard drive, and use boot camp to install windows onto the intel core, and basically have both a mac and a windows OS in one machine
even better would be to buy the virtualisation software by parralels which allows you to run windows within the MAC OS
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