Main/front page look and feel on other pages?

I've hit a wall and hoping someone may be able to advise. I feel it is something simple but I just can't figure it out/get it to work!

If you can imagine I have a themed site, of which I have some main navigation links. All I want to be able to do is click on those navigation links and be sent to a page that looks exactly the same as the front page (themed the same), the only exception being the new page will have a different logo through css and perhaps different images. How do I do this? I have seen mention of changing the template.php of the theme which I have done but still can't get it to work. Can anyone advise. I've listed what I've done below:

1. Created a new content type 'market_research'.

2. Made a copy of page.tpl.php (it's more or less the same as page--front.tpl.php) and changed it's name to page--market-research.tpl.php

3. Opened the template.php file within the theme (in sites/all/themes etc). Added the following function to the raft of code that was already contained within it:

/* New Content Type */

function [gomobile]_preprocess_page(&$vars, $hook) {
if (isset($vars['market_research'])) {
// If the node type is "blog_madness" the template suggestion will be "page--blog-madness.tpl.php".
$vars['theme_hook_suggestions'][] = 'page__market-research.tlp.php'. $vars['market_research']->type;
}
}

1. Cleared the cache and it doesn't appear to work???

Hope someone can advise :-)

Cheers

Stephen