Medal of Honor warfighter in a RGH xbox 360

Hello,
So I downloaded Medal of honor warfighter, after extracting the iso I got 2 dirs, DVD1 & DVD2, then I copied those 2 dirs in my external hard drive.
I connected the external hard drive to the xbox, went to usb0 and entred DVD 1, when I click Default.xex the game enter and I got a message about installing some hd visual graphics, if I press yes it says Please change disc.... and if I click no, I enter the game menu then I press signle player and it says change Disc, please insert...

Medal of Honor warfighter in a RGH xbox 360