Integrating/embeding another site into Joomla - Joomla! Forum - community, help and support

hey all,

i'm trying embed/integrate second site joomla.
i use iframe, problem actual link of iframed site doesn't change , don't want that.

what want add website in between joomlas header , footer , website have it's own links.

for phpbb know have edit overall_footer , overall_header html files, don't know have edit. take joomlas code , put there.
the second site has header , footer, guess principle same.

p.s. tried jfusion phpbb, "frameless" option waaay buggy i'm searching alternative.

p.s2. example forum. have phpbb body , header of joomla website.

can explain second website is?
is forum or blog? have static html/php pages or it's going cms?

if want keep same main website on second 1 concept modify template on match main website. depends kind of website want implement.