Looking to remove/update "node" class from a Content Slider content type

Hello all,

I hope this is an Ok place to post here. Seattle New Media has started a site for http://magicmasseuse.com and would like to make a Features section completely editable by the client.

ISSUE:
In an space/area just beneath the main navigation links is a where you would currently have rotating features content, and we intend to take that new custom "content type" called "features" and remove the background image/color that seems to be set by a class called "node." In this section we currently have the Content Slider module to rotate the "features" content type content, and the Block Theme module to strip out the content header. But this Block Theme does not seem to be enough to also strip the background image/color that is set. This seems to be in the code here:

, but this code also for all the rest of the site, not just that on content type. To remove/update "node" class from a Content Slider content type we have tried all kinds of little modules and hacks. We do not want to do this with too much custom code -- if possible. We would like to keep the modules we use mostly original, so they can be upgraded in the future.

Hope the above makes enough sense for someone to try to assist. :) The easiest way to see exactly what I am talking about is to look at the site and View Source to see what is there, and what we might do to make the background not show for the features. Thanks in advance if anyone can assist.