unrecognized hardware with 5.1

[Jackie S. McCracken]

I'm trying to build a Dell 1750 with 5.1.  After the kern and mfsroot floppies have loaded and the system starts to come up it reports an unrecognized chip set then once I try to run the ftp utility to load a minimum configuration it cannot see the NIC interface i.e. it's not part of the choices for the download.  The system came with a driver disk for the Broadcom NIC which is a 5704 gigabit interface but it only has drivers for Windows, Linux, and some other OS's but nothing for FreeBSD.  According to the Dell info it is a ServerWorks GC LE Chipset with 2:1 memory interleaving.  How do I get the system to run?  I need to get it up and running ASAP.

Jackie