I realize that there are posts out there for how to install windows via bootcamp without an optical drive...... for mac air, etc... but in my case, those don't seem to be valid options. I have a legal copy of windows 7, and am trying to install it to an iMac. Normally, this would take just a few minutes, and next to no thought at all. However, the optical drive in this machine is no longer functional. Do i absolutely HAVE to go save up money to get my optical drive replaced? Or is there another way to install it?