Windows 7: Help with Theme Creation

I have been working on a theme for a bit and am trying to figure out how you change the color or image background of the details pane windows explorer. This is what i mean:
http://th09.deviantart.net/fs71/PRE/...bd-d35kkef.png

I have gotten the pane to the top with reshacker simply changing some "bottom"s to "top"s But I want some custom Backgrounds in there. Any help would be freaking sweet. Thank you



Oh and the image is of sagorpirbd's longhorn theme for Windows 7
Longhorn

I would like to find that out too. I am creating a new theme, and i want it at least translucent. Somewhere in windows style builder i've tried but it doesn't work
EDIT: I know where to edit it, i want it translucent though.
k1m0s here: Explorer & Shell > Explorer > Preview Pane > 1 > <1> -- Edit the image

Need any more help? I found this EPIC tutorial on everything you could ask for. It's recommended you register at this website
http://virtualcustoms.net/viewtopic.php?f=63&t=2139

Also updated system specs, thanks to piriform speccy!

Awesome thank you so much. I will give it a try.

I managed to make it black using the above windows style builder property.
Do you have windows style builder?