Well this is a treat. My first time back to the forums in a while and there's a D&D TZH thread up. That just makes my day.
I haven't fully read the post yet, but I did notice something that somewhat confused me and I'd hope you would elaborate on. Generally, Undead don't have a Constitution score, what with not being alive anymore and all, and I notice you have most, if not all, of the templates as giving a +4 bonus to Constitution. Was that a mistake, or is there some part of the 3.5 Undead rule set I haven't read?