Yes, you can use different headers/footers for different pages
For example, index page
templates\tmpl_uni\page_1.html
__include _header.html__
__promo_code__
__page_main_code__
__include _footer.html__
include
_header.html page and
_footer.html

but you able create another footers/headers, like
_footer2.html or _footer_.html (as you want)
and just include its (as new footers)
__include _footer2.html__
or
__include _footer_.html__

;)