Look, guys, let me quote the guy who offered this file up as a cheat of sorts, guy named Littlefish:
Another useful feature is found on the CD in the text directory. Here you will find all of the mission orders that can be read with the DOS EDIT function. This feature, combined with the resupply schedule, makes it possible to perform some advance planning on how to use your weapons.
From this reading, and what I've posted so far, you'd think the file is a txt file, right? Not so. The extension is TBI.
Tell me. Is that why-- following gidierra's excellent directions--I get a file which reads like ancient hieroglyphics?
Any sufficiently advanced technology is indistinguishable from magic - A. C. Clarke