After finally having some time to play with this concept I went about it the "hard way." I exported a GEDCOM with all my ancestors, then reloaded it then exported a GEDCOM with William's descendants.
Using some free software I found (yEd) I was able to generate the kind of chart I'm looking for:http://www.cjlacour.com/photos/i-HPz435n/0/X3/i-HPz435n-X3.p...
This shows all lines of descent from William I to my great great grandfather. Yes, I had to delete the spouses manually to clean it up a bit.
So, since variety is the spice of life, anyone else have a method they use to accomplish the same thing?