I just downloaded and commited these w/o errors. Works in DCC and CAB in TS2012 ok.
SP Class GS-4 Steam Engine TS12,<kuid:591356:100076>
SP Class GS-4 Tender TS12,<kuid:591356:100075>
I would imagine he is talking about the consist, as the locos are quite easy to find. I know of only the early ones by Magicland, however SP is not my expertise so I'm not sure if they're the "Coast Daylight" or another of their trains