Network wirer
Connect them together VIA network wire. Don't need a cross over cable because the Mac is smart and can switch its port to make the cable become a cross over cable. Do the sharing on the Mac, System Pereferences, Sharing (third line), Check off Windows. Go to Windows computer, look in the network, log in as user of the mac, send files. Then when you load them into iTunes, you will autherize that Mac, deauthorize the PC if you want too.