Starkers- get_archive with featured image?

Hello All.

I am working on my personal site, and I have a section that I am using starkers basic theme. I have the following on my index page, to call in the last 5 posts.

<?php get_archives('postbypost', '5', 'html', '', '', FALSE); ?>

Simple enough. But now I would like not only to call those last 5 posts, but include their featured image as well. Since my PhP knowledge is literally relegated to hacks and basically pushing through stuff, I am not sure what is next if anything in this string to get the featured images included.

I’d appreciate any help or guidance. BTW my URL is
pixelneer

Thanks