Explore Rooted allows you to open a two-pane Windows Explorer window rooted to any folder. What's "rooted"? Only the selected folder and its subfolders will be shown in the left pane of the window, giving a clearer view of the folders and files you want to work with.

Right-click any folder or file icon and choose Explore Rooted from the ShellToys XP menu. (If you right-clicked a file, you'll see a rooted view of the folder containing it.)