Fix Page Element Styling

I currently have a directory on my site with files and folders. The folders look like this: [login to view URL] When you click on a folder, you see the files inside: [login to view URL] When you click on a file, it will open up in a lightbox: [login to view URL] I need a few things fixed. 1. When images, appear in the lightbox, I need it to maintain it's actual ratio. Currently, it is being stretched. Original image: [login to view URL] Stretched image in lightbox: [login to view URL] 2. When I create a sub-folder inside the folder, I need it to look like the folders: [login to view URL] 3. When I have sub-folders in the folder, the files will not open up in the same lightbox as above. Instead, it looks like this: [login to view URL] Please include the word "briefcase" at the top of your proposal, so that I know you've read the project description. Any proposal without this word will be declined.