Ok Imp, here we go - this is the modern one (it'll be a bit of desert-fighting to begin with, hope you don't mind).
Install the files into your campaign folder. It will use campaign slot 018. The first scenario will be a 1 turn affair. The second one is where the game proper starts.
Be sure to save the game before the battle ends, preferably on the very last turn before the end screen comes up. This must be done to allow additional scenarios to be added to the camp.
Don't be reckless with your core. Some refitting points have been added but you can not allow yourself to wast any units.
Good Luck and Good Hunting!