Thank you both Scott Horsley, MemoryX2 and Paul for the support and help as I had a few mistakes.
Please make sure you remember the link to your customer area for this.
Please be careful, this step is very important go to /config/blesta.php find the following line just at the bottom of the page:
Configure::set("Blesta.csrf_bypass", array());
and replace it with:
Configure::set("Blesta.csrf_bypass", array('client_login::index'));
The link below must be the link to your client area we've edited the link ourselves by editing the file (/config/routes.php):
<form method="post" action="http://billing.licensecart.com/customers/login/">
Then after the custom code edits and the hard bit for a few people, simply copy the rest of the code below:
sername: <input type="text" name="username" value="" id="login_username" /><br />
Password: <input type="password" name="password" value="" id="login_password" /><br />
<input type="submit" name="login" value="Login" class="btn" />
</form>
You can use the "class=btn" if you are using the bootstrap framework on your website.
So the final code should look something like:
<form method="post" action="http://billing.licensecart.com/customers/login/">
Username: <input type="text" name="username" value="" id="login_username" /><br />
Password: <input type="password" name="password" value="" id="login_password" /><br />
<input type="submit" name="login" value="Login" class="btn hide_submit" hidefocus="true" />
</form>
That will now allow users to log straight into your billing system. You can use target="_blank" on the form to open into a new tab.
Using Bootstrap and wish to use the posh Modal just edit the code below:
<!-- Button to trigger modal -->
<li><a href="#login"role="button" data-toggle="modal">Login</a>
<!-- Modal -->
<div id="login" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true"><i class="icon-remove text-error"></i></button>
<h3 id="myModalLabel">Billing Area Login</h3>
</div>
<div class="modal-body">
<p><form method="post" action="http://billing.licensecart.com/customers/login/" target="_blank" style="width: 200px;margin: 0 auto 0 auto;">
Username: <input type="text" name="username" value="" id="login_username" /><br />
Password: <input type="password" name="password" value="" id="login_password" /><br />
<input type="submit" name="login" value="Login" class="btn hide_submit" hidefocus="true" />
</form></p>
</div>
<div class="modal-footer">
<button class="btn btn-danger" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
</div>
Good luck with your great layout and the best billing system.