Some time ago I tested this technique to create headers and footers with the page-template file. If you want to take a look, here's the link to the ePUB:
http://www.pagelab.com.br/Headers-fo...xperiment.epub
It kinda works on ADE and it's ignored on iBooks, but it's a very complicated/deprecated way of doing it and will bloat your code with duplicated paragraph tags... Not really a solution.