Include template within template

[Dr.CSS]

Why do you want this?...

Sounds like you would use GCB, but why do this when a normal template works fine, if you want to do something different in each page to the header, body, footer you could always put multiple content blocks in the main template, {content block='header'} {content} {content block='footer'}, remember you always have to have {content] in your template...