OSD Computer Name

I have seen quite a few posts here about setting the computer name by prompting the user and/or using the MDT.  My goal is to do bare-metal, "unknown" builds that assign the computer name to be the serial number from the BIOS.  All our machines are Dell.  I would like to not have to integrate the MDT if possible, but if the MDT is the only way to do it, so be it.

Thanks in advance.