if i have my 360's firmware flashed with a modchip so it can play backups and i transfer a full game iso to the harddrive can i just play it directly off the harddrive?
How can you have your 360 firmware flashed with a modchip...? Have you had the firmware on the DVD flashed or do you have a physical modchip?
either way the answer is still NO The only games you can play on your hard drive are one's that you purchase at the Xbox Live Marketplace because those are downloaded to the hard drive.