How to add a link
 

I would like to add a link that points back to my vbulliten forum from photopost. Currently the template's Home link takes you back to the photopost home and I want to add another link that takes the member to my forum board. What file to I edit and how do I edit the file?

The menu is created in topmenu() function in pp-inc.php. You could add a link in there, but you might be better off adding a link within your header (On PhotoPostDev.Com I make the header clickable to the main index page).

Can you expain to me how to do this? Im not certain how to do this?

I would recommend you modify your vB3 header with a "FORUMS" link:

<a href="/forum/index.php">Forums</a>

inside your navbar template.