There is no way to play minecraft off of a flash drive but you can transfer it to a computer with no internet by copying the .minecraft folder ( located in C:\Users\User\AppData\Roaming) and the .exe on to a flash drive then dragging those files onto the destination computer in the same location. THis is the closest thing to playing it off a flash drive.
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Nope
No, you must buy a special memory card for the 360.
100% minecraft
Download Ultrasoft!! Its a VPN that blocks your schools IP!! Recommend putting it on a flashdrive.
Use the USB port to download onto the PS3 harddrive