I don't have experience either but:
1. The page templates are specific for Adobe Digital Editions readers, they are not in the ePUB standard (as far as I know), and other readers will probably not support that.
2. The way to have headers in the ePUB standard is by using the "display: oeb-page-head" CSS, property. This is currently not supported by ADE, but it seems it will be at some point. Other readers usually don't support it either, but it could be possible to convince the developers to do it.