The complex version of the NCAA Statistics rules can be found on their web site
NCAA Library
You can order it, but the online version is free (but 4 1/2 Megs big). It covers EVERYTHING you want to know about stats and how the NCAA calculates them (ever wonder if you charge the QB -1 yards for a kneel down? Answer from this is no. - lots of little tidbits of information for people who are interested)
In case my link didn't work, it is
http://www.ncaa.org/library/statisti...football_stats
James