Perfect Captain has released their AWI campaign rules titled Swamp Fox. It is free to download here :
http://games.groups.yahoo.com/group/perfect_captain/message/9445.
It was designed to be played with their "Patriots" rules but I am sure it can be used with many other sets of AWI rules.
The range of Perfect Captain rules are fun, quick to play and well thought out. If you haven't tried them, they are well worth checking out.