Claudette, are you talking about CMS.File? If yes, go to Page (Document in versions prior 8) Types application, navigate CMS.File page type, click Edit next to it, and switch to Fields tab.
Regarding Document Library web part: are you using all it's functionality? If you are using it only for documents listing, then you could easily use repeater for example, or any other viewer with whatever transformation you need.
If you're using Document Library not only for listing, I'd try to make a copy of it and try to modify it's look and fill.