James, you are very kind.
I've read every message in every thread that mentions Dell within the past six months. I think the answer may be in the thread "SME5.6 / e1000 NIC" but, to be honest, I'm not technically proficient enough to follow that discussion.
Explicit instructions would be very much appreciated.
And, now that I have found someone who has just installed 5.5 on the 600SC, have you figured out how to make the machine boot by default to esmith-up? I ran the /sbin/lilo command that someone on the forum recommended, but that did not do the trick.
Thanks,
Tim Takacs