To add an extra link to the Main Navigation Bar in the Theme Header.
Open: templates/default/overall_header.tpl
Find: (This Block).
<a href="{FULL_SITE_PATH}{U_PORTAL}">{L_HOME}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<a href="{FULL_SITE_PATH}{U_INDEX}">{L_INDEX}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- BEGIN switch_upi2db_off -->
<a href="{FULL_SITE_PATH}{U_SEARCH_NEW}">{L_NEW2}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- END switch_upi2db_off -->
<!-- BEGIN switch_upi2db_on -->
<span style="vertical-align: top;">{L_POSTS}: </span><a href="{FULL_SITE_PATH}{U_SEARCH_NEW}">{L_NEW2}</a><span style="vertical-align: top;"> • </span>{L_DISPLAY_U}<span style="vertical-align: top;"> • </span>{L_DISPLAY_M}<span style="vertical-align: top;"> • </span>{L_DISPLAY_P} <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- END switch_upi2db_on -->
<!-- IF S_LOGGED_IN -->
<a href="{FULL_SITE_PATH}{U_PROFILE}">{L_PROFILE}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ENDIF -->
<!-- IF S_HEADER_DROPDOWN -->
<a href="{FULL_SITE_PATH}{U_SEARCH}" onmouseover="dropdownmenu(this, event, menu1, '250px');" onmouseout="delayhidemenu();">{L_SEARCH}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ELSE -->
<a href="{FULL_SITE_PATH}{U_SEARCH}">{L_SEARCH}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ENDIF -->
<a href="{FULL_SITE_PATH}{U_FAQ}">{L_FAQ}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- IF not S_LOGGED_IN -->
<a href="{FULL_SITE_PATH}{U_REGISTER}">{L_REGISTER}</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ENDIF -->
<a href="{FULL_SITE_PATH}{U_LOGIN_LOGOUT}">{L_LOGIN_LOGOUT2}</a>
<a href="{FULL_SITE_PATH}Your Page URL Here">The Name of your link here</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- IF S_LOGGED_IN -->
<a href="{FULL_SITE_PATH}Your Page URL Here">The Name of your link here</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ENDIF -->
<!-- IF S_ADMIN -->
<a href="{FULL_SITE_PATH}Your Page URL Here">The Name of your link here</a> <img src="{FULL_SITE_PATH}{IMG_MENU_SEP}" alt="" />
<!-- ENDIF -->
There may be variations or different locations for different themes or styles etc, but the URL's and permissions remain basically the same.
;)