Yes, it did. Then I went to "LVMize" the Warp installation, and things got screwed up. (Alan Beagley over on ecomstation.support.lvm gave same simple instructions for enabling Warp4 to see LVM volumes.)
The weird part -- the instructions worked fine on my current machine. Warp can now see my eCS partitions. When I did *exactly* the same on the new machine, it wouldn't boot into Warp.
Do new computers now come equipped with built-in gremlins.
But thanks for your help on the one problem.