Post formatting

Hello yet again (are there any rules about how many topics you can post a day? )

Next issue: trying to make the posts in my forum look like they do here. On this forum each post has its own 'box', with the post body and the profile details contained within the box. There is a space and then the next poster's box appears. On my forum, its just a simple line that separates posts. There are far too many borders appearing in my forum; in this forum the profile details are contained within their own widget but, again, in my forum these details are only separated by a line.

I basically want more separation between posts and elements within said posts.

Thanks