How to install Boot Camp from content of previously created flash storage? I've installed Windows 7 SP1 via Boot Camp before and kept the content of  the SD card that I created during the process. I want to know how I can copy that content to another SD card and install off of it again.

Probably I have to do some things manually like making the flash storage bootable and/or creating a FAT32 partition from Disk Utility.

(And no, I can't download Boot Camp due to my very limited internet connection)

My rig: OS X Yosemite (10.10.3)
Boot Camp Assistant is already in Applications > Utilities. It doesn't need to be downloaded.

If the card was good enough to install Windows from last time, it ought to be good enough to do it again.