So I bought Windows and now I am trying to put the ISO onto a 4.7 GB DVD-RW Disc (which actually is only 4.37 GB). The Windows 8 ISO is... 4.37 GB. But when I tried using ImgBurn, it said that Windows 8 was 5 MB too big! Will this 5 MB be important or can I leave it off (If so, should I do overburn or truncate?) Thank you!