Don't have much time to write about the rules now but here is a link to the download. They are based on Andy Callan's Loose Files and American Scramble which appeared in Wargames Illustrated many moons ago. I got rid of all my wargame mags a few years back as part of a pre-family cull, only keeping my old Battle for Wargamers copies for sentimental value!
The rules were aimed at small scale actions to give largish unit sizes but allow the small contingents to have a presence as well. We only ever put together a Quick Reference Sheet as when playing we were still arguing about how it all worked.
I'll expand later and maybe add the links to the original rules but here's our version to be going on with:
Feel free to comment