FirstBootSet.exe is an installer-utility, that can be used to prepare a CF or CFast-card for a new hardware unit (MCC12 / MCC15). 

When executed, the installer will extract a so called "Flash2NewComputer" -exe on to the hard drive and adds a new option to
LiteShell-menu (tools -> devices -> Flash refresh). 

After the FirstBootSet-utility has been executed all the hardware-related installers will be reinstalled automatically during
the next computer startup. After the initial install the flash can be set to this mode again by clicking the Flash refresh option
from LiteShell. 

This tool should be used to prepare a flash card whenever a new card is sent to the customer to replace an old one.