I believe you're referring to the status bar not appearing by default in XP. To turn it on go to the view menu and check Status Bar. Then go to Tools, Folder Options, and select the View tab. Click the "Like Current Folder" button to set it so that you see the status bar in all folders. (If you don't, you'll only see it when you're in that folder, or only until you close that Explorer window).
Of course, selecting details is also a way, and I prefer it, but some people like to have icons instead of just a file listing.