Easy Win7 Bootable USB Stick for Netbooks
I came across a handy link to a tool from Microsoft for creating bootable USB sticks from your Windows 7 (or Vista or Linux) bootable DVD ISO file. IanAtkin posted another method here, but this is an official MS tool. I haven't done much testing with it myself (I only have a 2GB USB stick handy currently) but it seems you can use it to "burn" a bootable DVD ISO of any sort to USB quickly and easily...and it will apparently burn DVD ISOs as well to a DVD burner. From my brief testing, it only seems to work with DVD ISOs, but not CD ISOs.
You can download it from the Microsoft Store.