bmcclure, "Length of Image File Name Specified Must Not be More than 8 Characters" is due to the DOS file naming system. DOS cannot recognize anything more than 8 characters, so if your SFI file name is longer than 8 character, rename it to something shorter and it should work.
Apart from that, you can also try using the "dir/w" on the command prompt. Look for your SFI extension filename and use the filename as listed accordingly.
Hopefully this help if you've yet to get any response from Samsung.