I need to build a USB stick process for new installations of Windows. It's been a few years since I have done this kind of work so I am not sure where to begin. Ideally, I would like to be able to simply dump ISO files (Windows or Linux) onto the stick along with other data, and be able to select which ISO to boot from whenever I boot to the stick. The stick would otherwise function normally. Assistance in finding/building this solution is greatly appreciated.