Not sure how to do that slimbox business, but here's a higher res version of the cover.
It's time you figured it out:
Tip #1
To add a gallery to your post use the following HTML syntax:
<a href="http://www.website.com/your_high_resolution_gallery_url.jpg"
rel="lightbox[8.1.2008]"><img src="http://www.website.com/your_thumbnail_url.jpg"
alt="your_alternate_text" /></a>
<a href="http://www.website.com/your_other_high_resolution_gallery_url.jpg"
rel="lightbox[8.1.2008]"><img src="http://www.website.com/your_other_thumbnail_url.jpg"
alt="your_alternate_text" /></a>
The rel="lightbox[8.1.2008]" portion should cage your images in their own gallery. The number used is the date of the post. If there is more than one post per day and yours is a later post, please extend that number with the time of day or whatever.
Be careful not to leave spaces between your HTML elements, because Wordpress is likely to interpret them oddly (normal HTML ignores most white space, Wordpress tries to be all intuitive and stuff)
I'll work on giving contributors upload privileges, but in the mean time just use whatever image links you have.