I just built a computer but i do not have an optical drive nor do i have a large enough USB drive to use as a boot tool (cant buy one either) However, i do have an external HDD. I know a lot of people say this isn't possible but here is what i want to do. I want to be able to put the iso files onto my external hdd then once that is done with, i would take the hdd out of the external storage compartment and use that hdd as my main drive for my computer (using SATA cable, like if it was a normal hdd) The problem is, im not sure how to transfer the ISO file onto the HDD all the while making it bootable. Right now I am using a netbook. I already have the single windows 7 ISO file, along with a legit key.