Footed shafts are nothing more then a arrow shaft that has a hardwood section spliced to the end, similar to a pool cue. Having 3 or 4 points.
The idea was when the folks were making shafts back in the day, they would end up breaking them. This would obviously make problems due to the fact they made them by hand. So they footed either before they shot them, or after one broke.
Here is a link to a page I have going on doing 4's.
http://community.webshots.com/user/lilhunter007
I am still looking for a better, more consistent way of rounding then what I am doing. You can do this by hand with some simple tools or if you have access to a machinist lathe you can really go to town.
Hope that clears some things up for ya.