Would anyone be willing to change a tumblr layout?

Hi, I was trying to figure out how to change the padding(?) on my tumblr layout. this is my layout. http://brolar-eclipse.tumblr.com/ I read on some other posts that people are reluctant to help because people change their layouts, but I would appreciate learning a little bit more about this.

Regardless, I was hoping I could get my blog looking more like this, while keeping the bg image. http://johnnyratchko.tumblr.com/ that blue behind the posts is what I was hoping to find out how to make, but instead of blue, 50% opaque gray.

Thanks.