I'm going to guess that someone contacted the author of Fields of Battle to see if he would make the content available to the public.
The reason I was wondering is that it has been listed as part of the author publications on Wiki. I guess I was hoping that he would have been willing to let it go out since the system is defunct and is no doubt proud of his work.
After almost a three year hiatus my LOTR group is restarting and I was hoping to have some more variations for their characters. Now that I have two kids life has really kicked in and limited my time to tinker with the system.