VB and WordPress share same login user and password ?

[xboxsold]

I was using word press as a example as im using VB but not with WP so i dont need a plugin i just need help on how to modify the code. I did this before 2 years ago but can remember how here is the modified code i had for the header:

<? if (isset($_SESSION['userID'])) { ?>
<br/><br/><br/><h2>Welcome, <?=$_SESSION['username']?></h2><br />
<div class="logout"><a href="/forums/login.php?do=logout"></a></div>
<? } else if (!ereg("MSIE 6.0", $_SERVER['HTTP_USER_AGENT'])) { ?>
<br />
<form action="/forums/login.php" method="post" onsubmit="md5hash(vb_login_password, vb_login_md5password, vb_login_md5password_utf)">
<div class="t_llogin"><div class="b_llogin"><div class="b_rlogin"><div class="t_rlogin"><img src="/styles/1/layout/username.jpg" alt="" /><input name="vb_login_username" type="text" class="signup_forms" onfocus="if (this.value == '$vbphrase[username]') this.value = '';" size="20" /></div></div></div></div>
<div class="t_llogin"><div class="b_llogin"><div class="b_rlogin"><div class="t_rlogin"><img src="/styles/1/layout/password.jpg" alt="" /><input name="vb_login_password" type="password" class="signup_forms" size="20" /></div></div></div></div>
<div style="float:left;margin-top:4px;"><input type="checkbox" checked="checked" />Remember Me?</div><div class="loginsubmit"><input type="image" src="/styles/1/layout/clear.gif" style="width:104px;height:27px" id="login"/></div>
<input type="hidden" name="cookieuser" id="cb_cookieuser_navbar" value="1" checked="checked" />
<input type="hidden" name="s" value="<?=$_SESSION['sessionhash']?>" />
<input type="hidden" name="do" value="login" />
<input type="hidden" name="vb_login_md5password" />
<input type="hidden" name="vb_login_md5password_utf"/>
</form>
<? } ?>