Command line during mini-setup

After messing with an error during our sysprep/mini-setup routine, I found an obscure reference on the net about hitting Shift-F10 to bring up a command window during mini-setup so that you can troubleshoot what's going on.  I'll be damned...it works.  This little trick helped us better understand what was going on and gave us the ability to try different settings in the sysprep.inf until we got one that worked.