Well… Buidling a second sidebar is a matter of CSS & HTML… all i can say about that is that you should think of the structure you want, then create a div before or after the content (Depends on the position) and change othere containers sizes so they would all fit.
If you got something like this:
<!--======= YOUR CSS ========-->
.bodyContainer { width: 960px; }
.left { float: left; width: 300px;}
.content { float: center; width: 650px;}
<!--======= YOUR HTML ========-->
<div class="bodyContainer">
<div class="left">
You left sidebar
</div>
<div class="center">
Your Content
</div>
<br style="clear: left;" />
</div>
It Should turn into something like this:
<!--======= YOUR CSS ========-->
.bodyContainer { width: 960px; }
.left { float: left; width: 200px;}
.content { float: left; width: 550px;}
.right { float: left; width: 200px;}
<!--======= YOUR HTML ========-->
<div class="bodyContainer">
<div class="left">
You left sidebar
</div>
<div class="center">
Your Content
</div>
<div class="right">
Your Right Sidebar
</div>
<br style="clear: left;" />
</div>
.
I can’t build it for you cuz’ it would take me some time but that the essence of it right?
As for the Image on the side… Once you a have a sidebar to the right you can define a new Thumbnail and call it into that div class=”right”… that real easy and should be done like this:
In your functions.php file:
add_image_size('rsidebar-thumb', 600, 200, true); // 600=width / 200=height
.
Then in you right sidebar paste this:
<?php the_post_thumbnail('rsidebar-thumb'); ?>
.
And now you can enter an image for eash post with ease..