http://msdn.microsoft.com/en-us/windows/apps/br229516The largest ISO on ther will need a dual-layer DVD-R, but luckily you can use the MS sanctioned ISO to USB tool they provide for free from the MS store.
http://www.microsoftstore.com/store/msstore/html/pbPage.Help_Win7_usbdvd_dwnToolI'm guessing this will work too.
http://technet.microsoft.com/en-us/magazine/dd535816.aspxI used that to install Win7 from a flash drive.
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RollergettesEdit: my ignorance is my downfall.