Bootcamp problem

First, i wanted to download bootcamp which i did, then i downloaded windows 8 and had it in a usb of 4gb i tried to download it and i couldnt so i continued and tried downloading separetly from the drivers, now i have 2 usbs with 1 with the drivers and the other one with the windows both of them went through bootcamp and said i finished, i want to know how to make it run