[Logikos]

Do this:

In template "phpinclude_start"

Add:

PHP Code:

// forum stats start
        $numbersmembers=$DB_site->query_first('SELECT COUNT(*) AS users,MAX(userid) AS max FROM user');
        $numbermembers=number_format($numbersmembers['users']);
        $countposts=$DB_site->query_first('SELECT COUNT(*) AS posts FROM post');
        $totalposts=number_format($countposts['posts']);
        $countthreads=$DB_site->query_first('SELECT COUNT(*) AS threads FROM thread');
        $totalthreads=number_format($countthreads['threads']);
// forum stats end

// total online start
        $datecut = TIMENOW - $vboptions['cookietimeout'];
        $headerguests=$DB_site->query_first("SELECT COUNT(*) AS count FROM session WHERE userid=0 AND lastactivity>$datecut");
        $headerusers=$DB_site->query_first("SELECT COUNT(DISTINCT(userid)) AS count FROM session WHERE session.userid>0 AND session.lastactivity>$datecut");
        $headerguests=$headerguests[count];
        $headerusers=$headerusers[count];
        $totalonline=$headerguests+$headerusers;
// total online end 


Then use $numbermembers, $totalposts, $totalthreads, $totalonline in the header template for the Total Number of post, threads, members, and total number of who is online.

As for the login/logout. Do this in the header template:

<if condition="$bbuserinfo['userid']">
        <a href="login.php?$session[sessionurl]do=logout" onclick="return log_out()">Logout</a>
<else />
        <!-- login form -->
                <form action="login.php" method="post" onsubmit="md5hash(vb_login_password,vb_login_md5password,vb_login_md5password_utf)">
                <script type="text/javascript" src="clientscript/vbulletin_md5.js"></script>
                <table cellpadding="0" cellspacing="$stylevar[formspacer]" border="0" valign="bottom">
                <tr>
                        <td class="smallfont">User:</td>
                        <td><input type="text" class="button" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="1" value="$vbphrase[username]" onfocus="if (this.value == '$vbphrase[username]') this.value = '';" /></td>
                        <td class="smallfont" colspan="2" nowrap="nowrap"><label for="cb_cookieuser_navbar"><input type="checkbox" name="cookieuser" value="1" tabindex="3" id="cb_cookieuser_navbar" accesskey="c" checked="checked" />$vbphrase[remember_me]</label></td>
                </tr>
                <tr>
                        <td class="smallfont">Pass:</td>
                        <td><input type="password" class="button" name="vb_login_password" size="10" accesskey="p" tabindex="2" /></td>
                        <td><input type="submit" class="button" value="$vbphrase[log_in]" tabindex="4" title="$vbphrase[enter_username_to_login_or_register]" accesskey="s" /></td>
                </tr>
                </table>
                <input type="hidden" name="s" value="$session[sessionhash]" />
                <input type="hidden" name="do" value="login" />
                <input type="hidden" name="forceredirect" value="1" />
                <input type="hidden" name="vb_login_md5password" />
                <input type="hidden" name="vb_login_md5password_utf" />
                </form>
        <!-- / login form -->
</if>

To show the username. Add this in the header template

$bbuserinfo[username]

As for the avatar, i would have to look into that. But there is most of everything you need. No need to hack files.