Hi TobiSGD. Well, yeah, that makes perfect sense.
I guess that I should have thought my question out a litle better before writing it. I think what I really want to have in my Downloads file is an .iso that can be placed on any media (CD/DVD/usb stick). I'm not sure how unetbootin turns an .iso into bootable form, so I'm just not sure what to extract from the USB stick.