One of the drawbacks of using LiveCDs is that we can't record any data on the optical media, so each time that it's rebooted, the system will be the original one. With LiveUSBs it's possible to configure everything so that this doesn't happen. So with Fedora Live USB Creator we'll obtain a brilliant assistant that will help us in this task.
This software, that's compatible with the majority of versions of Fedora, once launched like any Windows application will ask you to input a CD or DVD with the Linux distribution and to connect the USB flash drive, after this it will allow us to choose the size that we'll dedicate to the Linux distribution on our pendrive.
Once we have the pendrive prepared, we'll only have to turn on a PC with the BIOS configured to start from the USB with the USB pendrive connected, and Fedora will start.