@jgt........They look like two really useful pieces of software. I will be checking them out. Thanks. Like the archaeologist said, "I didn't find it because I wasn't looking for it", however, now...
@RudiC........In this case, SCO is installed by booting from DVD/CD but then reading boot-time disk drivers from a floppy during the process. So it isn't the case that we need the floppy USB stick...
This is where a USB floppy drive comes in really handy both to write the BTLD floppies on the Linux box and read them (as BTLD driver(s)) on installation.