Start PowerISO (v8. · Connect the USB drive to the computer. · Click on USB toolbar button and select Create bootable USB drive... from the popup menu.
You can do what you want but you don't burn an .iso to a USB drive, you mount the .iso and copy the files over. Of course the USB drive has to be configured ...
The program's interface is very simple, you only need select the ISO file you want to burn and the target USB drive, then click Burn button, an USB disk that ...